Patreon has over leveraged themselves via VC investment and they have nowhere to go but up.
Creators are not wedded to middlemen, especially those who provide little value.
Other companies such as BitPatreon, SubscribeStar, etc have recently started to gain marketshare, albeit a small one. It continues to grow.
Princess Leia said it best: "The more you tighten your grip, Patreon, the more creators will slip through your fingers."