Listen, I have no idea whether Zistle makes any money but the site is a great resource for collectors regardless. I've spent the last few hours working out their masterpieces postings the best I can. What they need are for people to go in and sort through their sets to make sure the checklists are accurate. If you contact them through twitter they will probably set you up as an "expert" for the sets where you know what you are talking about.
Also if you just have a scanned collection you can follow this tutorial to just drag and drop pics.