Adspert’s billing system is performance-based.  In the Lite package for beginners, you pay a flat rate. In the Standard packages for Amazon Ads and eBay Ads, you pay monthly with a share of the paid sales generated by the campaigns you have optimized with Adspert (1.75% for Amazon Ads campaigns, 2.4% for eBay Ads campaigns). In the Standard package for Search (Google Ads and Microsoft Ads campaigns), we charge you 3.5% of the advertising spend you optimized with Adspert.