These articles seem to pop up from time to time, and the persons numbers seem roughly accurate in my experience.

In my experience Patreon has been around 11% cut scenario, split very roughly between Payment Fees and Platform fees. But I am on the Founders plan, which is the same 5% platform fees as Patreon Lite, but with the extra features of the 8% Pro plans.

I do think it is probably best for creators to diversify their platforms, but I still think that Patreon is worth it just because of it being a very well known platform outside of just tech circles.