Seems like these are web "tools" people use to monetize links, e.g. the link might be "download the new Marvel movie", you click on it and the URL is one of the

Seems like these are web "tools" people use to monetize links, e.g. the link might be "download the new Marvel movie", you click on it and the URL is one of these sites with a parameter/ID that resolve to the URL to the "goods", but first you'd have to watch an ad. Or maybe even do complex tasks like register on some site (where someone will earn the referral bonus). I guess a crowd-sourced database of the actual target links is a solution...