I’m not sure when this was added but there is a subscribe tab on the main page now. Clicking on this leads to an empty page with the phrase “There are currently no products available”.
Honestly I’d probably keep some kind of forums subscription if the perks were genuinely useful. Stuff on Vetex’s patreon doesn’t stay exclusive all that long or just doesn’t seem like anything to sweat about, while the in-game subscriptions don’t seem all that worthwhile to me.