What are some alternatives?
AdHitz - Lets you sell ad space on your site. You choose the details and then paste the code to your site.
Google AdSense - Use Google AdSense to make money online by placing ads on your website and YouTube channel. Start monetizing your website with Google AdSense today.
LinkedIn Ads - Targeted advertising on LinkedIn
PropellerAds - Propeller Ads is a full and self-service advertising network providing comprehensive and industry...
AccountJoy - Execute effective advertising campaigns to exactly the accounts you want to target.