Everyone knows that there is going to be a saturation point, when everyone who wants to play D&D is playing D&D. There is also going to invetably be drop off: some will leave for other RPGs but most will just leave the hobby altogether becasue it was a brief love affair, or something to do during the pandemic, or they outgrow it, or whatever. So WotC is forced to sell more to a higher perecentage of players. Since we (and they) know books aren't going to do that, it is pretty likely that monetization is going to come through D&DB and the VTT (along with merch and D&D branded mobile apps, video games and other sundries).
Here's the thing, as long as they don't pull licenses from other VTTs, I don't care.