This is pretty useless. It spams the feed. We know that people want cool new features. Supporting will not in any way make a suggestion any more likely to happen. 99% of the development suggestions that I see have already been thought of and discussed between the developers, and we have a pretty solid plan of what we want to do (short term). A bunch of mere “supports” on a suggestion topic will not make us drop everything and work on something else. Feel free to make actual comments on the topic, tough. Like I said, most of these ideas have already been discussed. If they’re not in game yet, that’s because we decided not to add it, or it’s not complete/prioritized.
EDIT/TL;DR: If you want to show your support for an idea, use the like button!