I mean sure, you'll get ratings by spamming the link to your game everywhere, but it certainly doesn't help the quality of those ratings. Also, for a rate for rate post to work, you should at the very least play and leave feedback on their game, not just say "here's my game https://itch.io/jam/brackeys-9/rate/1931702#comments" and not even look at the other person's.
Plus spamming a link everywhere is obnoxious and it takes away from any interesting posts as the get buried by the one phrase copy and pasted into every community post under the sun.