I've noticed that advertising is a big issue on scratch. When users are told to stop advertising, they often continue to do it. I have seen this on many popular projects, and it is oftentimes after the creator of the project has said "please don't advertise." This is NOT okay.
I know I am not the only scratcher with this issue. Join this studio, and spread the word about adverts.
(sorry if I sound a little venty :P)
btw- I think that advertsing in places you are MEANT to advertise is 100% okay!
Only add projects related to advertising!