We feel you. it is extremely depressing to see that the only reason people are playing your game is that you played theirs and wrote some lines of feedback. But we also think it is quite understandable(?) to go for "rate for rate" because everyone put their heart into their games (I mean, did anyone realy sleep last night?) and thenn you want people to play it. If you have like a bigger "fanbase" (e.g. on Twitter) it might be easier. But if it´s your first ever gamejam and you see that everyone is doing rate for rate you might start too, beacause you don´t see any other way.