If you check their info on Steem Engine, you'll see that they already have the maximum supply in circulation, so it looks like there can't be inflation.

I can see people leaving useless comments all over the place just to farm the tokens. I think they have something in place or something planned to correct this behaviour. They might block abusers from receiving comment coins. I think I read something about it somewhere, probably in their Discord or one of their posts. I know that they already block a lot of automated commenting like steemitboard and other services that leave automated comments all over the place . The comment coins are meant to encourage meaningful engagement.

It looks like there's someone trying to snipe possible curation on the comments from the commentcoin account. If you look at all the comments, there's a 1% vote on every single one of them. I'm not sure how lucrative that could be. I upvote their comments once in a while to help out, but I give a high enough vote so it won't go to dust. There's no use in wasting voting power on something that'll go to dust, and I don't want to strain the bunny either; he's got his boots full as it is.