What are some alternatives?
Best Referral Programs - A curated directory of startup referral programs
Waitlisted - Waitlisted helps new brands and startups build an audience while they focus on building a product
Viral Loops for Startups - Virality for startups made easy 💪
Lucky Retweet - Paste a tweet and choose a number of lucky winners
GiveYaw - Online giveaways made easy 🎁
Rafflecopter - Rafflecopter is a web app that makes it easy to run a giveaway promotion.