The data feed shows 15K+ products, but when I use create database button only 66 products show!

This is a setup error! The reason you only have 66 products with STCtoCart is because you set the minimum profit margin to 65.50% very few product at SexToyClub are going to provide that much profit between the wholesale price and the recommended retail price. STCtoCart was doing what you told it to do. Sell only products with at least 65.50% profit.

Please remember the profit margin area of STCtoCart determines the profit margin directly from the data feed wholesale and retail prices. The reason this feature was origninally initiaed is because at one point there where products with wholesale prices more then the retail price. However used in conjunction with the "Global Price Settings" you'll be able to do amasing things. See Start Part 3 for some examples.