This is true, but I think it tends to favor established players. Look at YouTubers. I follow a few Youtubers and have for years. They all seem to be moving over to Twitch and the Paetreon model for support, specifically the Amazon Prime method. This is in part due to the lessening of Youtube's $$/view. I think this is great for them, and I pay them to continue doing what I love for them to do. However, I find that there are less and less people entering the 'market' over time. Is this a bad/good thing? I have no idea, just an observation.
I think the fact that people's Patreon income is visible might make it self-balancing.
If you like popular creator, but see that they're already getting quite a bit of money on Patreon, you're less likely to support them than another creator that you only kind of like, but who is currently getting less than you think they deserve. Unless the popular creator can convince you that they can spend the extra money to make their content better, and thus be worth it.
So I think with Patreon, creators' revenues will tend to converge on what people think they're actually worth.
