Absolutely! But, as is seemingly common, I agree with Silent. Fortunately in the coming year classes will be less frequent as to let us recoup more, so more opportunities for competitions arise.
I love ’em, give me a goal and some inspiration. Oh, and prizes! That’s nice too. I personally don’t feel I’m good enough to compete in a 2D or Unity contest (the hell would a Unity contest look like? A Game Jam?) but I definitely see the appeal in them too. The only concern is that they might run out of prizes if they keep doing them that frequently lol.