I didn't know it was a marketing strategy. I follow artists I like so i don't forget them and i can find them easy. I favorite pieces I want to look at again or possibly buy. The idea that somehow likes, favs, comments, etc are going to be cumulative and keep moving you up the search or somehow magically result in sales is most likely false. It's good to have some activity on an image and maybe that just proves the image was not just dumped here. And maybe that moves you or your art up a slot over those with no activity. But largely is is not a very productive way to market. I don't see how having too many likes hurts anything so why put a limit on them.
Edit to add. If you think a limit should be put on likes so they don't count any more for search ranking, you can be sure that is in place. They are not going to let gaming of the system like that influence search ranking.The amount that count in a search is probably a lot lower than most people think.
