+ Is it that Patreon is managed worse?
+ That the ecosystem has changed in the last few years?
+ Are they trying to do something substantively more intensive than Kickstarter?
Patreon has a slow and steady growth rate, while Kickstarter grew quite rapidly gaining a lot of press from big campaigns brining in huge amounts of money all at once(where Kickstarter got a huge influx of cash each time a 30-day campaign completed). For Patreon, people are more hesitant to sign-up for a subscription type expense. After a popular creator starts a Patreon and gets that initial boost, the growth rate for them is quite linear.
A large Patreon campaign of $60K/month nets Patreon $3,000 while a large Kickstarter campaign of $3M nets Kickstarter $150,000.