Userscripts VS PredictIt

• Customization
  Userscripts allow for extensive customization of web experiences, as users can write scripts in JavaScript to modify the behavior and appearance of websites according to their needs.
• Enhanced Productivity
  By automating repetitive tasks and adding useful shortcuts, userscripts can significantly enhance productivity for users who interact frequently with specific web applications.
• Open Source Nature
  Being hosted on GitHub, Userscripts is open source, allowing developers to contribute, review the code for security purposes, and fork the project for personal use.
• Community Support
  Userscripts have a strong community backing, with many scripts readily available through various online repositories, providing users with a wide array of pre-made scripts to choose from.
• Cross-Browser Compatibility
  Many userscripts are designed to be cross-browser compatible, functioning in browsers like Chrome, Firefox, and others that support userscript managers like Tampermonkey or Greasemonkey.

Possible disadvantages

• Security Risks
  Userscripts can pose security risks, as malicious scripts could potentially capture sensitive user data or perform harmful actions on behalf of the user.
• Maintenance Overhead
  As websites update their structures and functionalities, users may need to frequently maintain or update their scripts to ensure continued compatibility and performance.
• Technical Barrier
  Creating and managing userscripts often requires a certain level of technical knowledge, particularly in JavaScript, which may not be accessible to non-technical users.
• Browser Deprecation Concerns
  Future browser updates might deprecate some functionalities that userscripts rely on, potentially rendering some scripts useless unless updated.
• Performance Impact
  Poorly written or overly complex scripts might lead to performance issues, slowing down browsers or websites as they perform additional processing on pages.

• Real-money political forecasting
  PredictIt allows users to trade on real-world political and economic events using actual money, providing tangible financial incentives that can lead to more accurate crowd-sourced predictions than traditional polling.
• Academic legitimacy
  Operated in partnership with Victoria University of Wellington, PredictIt has a no-action letter from the CFTC for academic research purposes, giving it a degree of regulatory recognition and legitimacy compared to unregulated prediction markets.
• Diverse market offerings
  The platform covers a wide range of topics beyond just elections, including legislative outcomes, court decisions, economic indicators, and other newsworthy events, giving traders many opportunities to speculate.
• Transparent pricing reflecting probabilities
  Contract prices on PredictIt (ranging from $0.01 to $1.00) directly reflect the market's perceived probability of an event occurring, making it easy to interpret sentiment and track how odds shift over time.
• Low barrier to entry
  Users can start trading with small amounts of money, as low as a few dollars per contract, making it accessible to casual traders and enthusiasts who want to engage with political forecasting without significant capital investment.

Possible disadvantages

• Trading and withdrawal fees
  PredictIt charges a 10% fee on profits from winning trades and a 5% fee on withdrawals, which can significantly cut into overall returns compared to other trading or investment platforms.
• Position limits restrict scalability
  The platform caps the number of shares a single user can hold in any given market (historically around 850 shares per contract), preventing large-scale trading or significant capital deployment even when a trader has high confidence in an outcome.
• Regulatory uncertainty and legal challenges
  PredictIt has faced ongoing regulatory scrutiny, including a CFTC attempt to revoke its no-action letter, creating uncertainty about the platform's long-term legal status and potential for sudden shutdowns or operational disruptions.
• Liquidity issues in niche markets
  While major political markets like presidential elections have good liquidity, many smaller or niche contracts suffer from low trading volume, resulting in wide bid-ask spreads and difficulty executing trades at fair prices.
• Limited to U.S. users primarily
  The platform's terms of service and functionality are primarily designed for U.S.-based users, and non-U.S. residents may face restrictions or complications when trying to deposit, withdraw, or verify their accounts.

5 Recommended Tampermonkey Userscripts in 2022

More videos

No PredictIt videos yet. You could help us improve this page by suggesting one.

• Jeffgeerling.com has been Migrated to Hugo

  The looking icon is the Userscripts extensions. https://github.com/quoid/userscripts. - Source: Hacker News / 9 months ago

• Show HN: My first programming project – userscripts to change forum UIs

  Hi, I'm Will. I'm 24, autistic, and have OCD tendencies. I'm learning to code and this is my first public project. I’d really appreciate your feedback and encouragement! This project lets me solve some of my OCD problems online. There... - Source: Hacker News / over 2 years ago

• Show HN: HNRelevant – Explore Related Discussions on HN in an Integrated Sidebar

  You can use userscripts [1] which is a safari extension which allows you to add userscripts, and the author of this work have an userscript [2] that you can use with safari (or any other browser) [1] https://github.com/quoid/userscripts. - Source: Hacker News / over 2 years ago

View more

Tracking PredictIt since Aug 2026.