Even if you are the biggest stickler for that "pure" chat experience, there is really only one significant problem with the Twitch Cheers™ system, and that is that it achieves precisely the opposite of what it advertises.

"Yay, a new way for me to make money!" Let me stop you there. Money is a scarce commodity, and people have X dollars to spend. As far as they are concerned, they want to send you those X dollars because you are good streamman and you make content more good and want to encourage you to keep making content good. So they send you X dollars. Yay, you win.

Now, they buy Bits™. These X dollars convert into some number of Bits, and the user sends those Bits to you. Except these Bits don't convert back to X dollars, they convert to ~70% of X. So now you have made less money. Users aren't going to make up this difference by buying more Bits. So the 30% pays for what? A shiny gif? No thanks, it seems pretty gaudy. A chat badge? I block most of those with FFZ because they clutter up a space already overfilled with nonsense.

Twitch doesn't know how to get their cut. But Twitch viewers sure do love to draw attention to themselves. This will ultimately probably end up sticking, unfortunately.