For example, for me, $15 is quite a good payout for my posts. This will give me $7.50 author rewards. When I set the percentage of commentrewarder to 5% it will result in $0.38.
When I give 5 comments an upvote it will be $0.076 cents for each comment.
I don't think that will attract a lot of extra commenters for my posts.I really like the @commentrewarder initiative since it incentivizes people to comment more. Only, I don't really see how it would improve curation. Yes, you give away more of the author rewards, but I think this only helps when the author gets a lot of rewards.
I do like all initiatives that improve a better distribution of rewards and/or combat autovotes on overrewarded posts.
The thought process is basically this.
I see you set CR as beneficiary, let's say maybe a bit higher than 5%, I see it got a lot of extra comments (maybe cause of that) and that you curated them well. So now instead of giving you a vote I would've usually given you, 50% for instance, I'd decide to give you a 100% vote instead to make up for the 5-10% CR beneficiary and at the same time leave you a comment so you'd vote it. Now I'd get half of the rewards back from curation + a little extra cause I left you a comment, which mainly is only something manual curators can do. Of course not all manual curators would care to leave a comment for the extra rewards, but maybe they'd pay attention to the reward.app part as well.
So in the end, even if authors are spending 10-20% beneficiaries on CR and RA, they could potentially still make the same if not more author rewards because curators notice that author is sharing the rewards with curators and commenters compared to those not doing so at all and vote them higher than they would have.
In terms of reward pool this of course doesn't change much if autovoters keep autovoting like usual, but maybe manual voters would target their votes a bit better than they would have in the past and maybe it could encourage some users to trail the manual voters rather or autovoters would start updating their votes more often or even change to manual, who knows. Either way, if manual voters start earning a bit higher APR because of this it's a win in the long run.