As a heavy Patreon user (donator side) I don't think this is true for Patreon. It may be true for Apple but it isn't true for Patreon. They do almost nothing as

As a heavy Patreon user (donator side) I don't think this is true for Patreon. It may be true for Apple but it isn't true for Patreon. They do almost nothing as far as helping the creator's reach. The typical funnel is people find creators on YouTube first and then look up their Patreon if they want to support the channel. The discovery happens on YouTube or another platform. It's difficult to find new creators on Patreon's website even if that's literally what you want to do; I use Google to find the Patreon pages! I doubt that having a Patreon has any impact at all on the number of viewers; it's just a convenient solution once your viewers have already decided to pay you. IMO this should be concerning to Patreon: there's no stickiness in their platform; a competitor could easily take over, and the creators can easily switch. On the other hand, switching away from YouTube would be instant channel suicide, because they are actually the ones providing the reach. I think YouTube must see the existence of Patreon as a critical failure. YouTube is doing all the hard work and Patreon is getting paid for it!