If Skimlinks have an affiliate partnership with a website that you click on a link from Flyertalk, then the clickthrough is tracked and any transaction you perform may end up giving affiliate revenue to Internet Brands.

This could also include transactions done much later on that site.

Now if you click a link from Fatwallet, then a different cookie will be set and you should earn the affiliate revenue. However, if you clicked on the link from FT later than the FW one, then you may have the revenue going to IB.

So Skimlinks doesn't steal your clicks (ie, clicking a link from FW won't magically get stolen by Skimlinks). But when you have different affiliate links being used, it can cause problems with getting correct cashbacks. It is also another reason why you should clear cookies for particular websites when attempting to use affiliate links.

Hope that helps explain things.