Once they manage to get enough Adobe customers on there and get some good market share, the investors will want their money multiplied (and you can't realistically do that just with AI features), so they will use the same playbook like any other business out there that used VC money to take over a market, and make you pay, probably first for proper support, and then more and more updates will come only to the + subscriptions.
The alternative is that they monetize it the same way Canva monetizes its other products: most features free, "pro" subscription for online collaboration/server-driven stuff and a library of stock content. Plus an enterprise tier.
All of that could get added to affinity without changing its core offering, which would be consistent with both their past strategy and their current messaging.
