Comments are paid out exactly the same way as posts. So since I happened to see this and upvote it in minute one you should get a nice tiny bump.

I read that upvoting, if not 2c or more, is cancelled.

If the total payout is less than 2c it doesn't pay out. It doesn't necessarily mean a smaller upvote won't, it just needs to have more votes on the post/comment to make it work. There's now a service @dustsweeper that can clean those up and make they they pay out, as well.