They and DTRPG takes 50%.
DTRPG when exclusive takes 30%.
Itch.io varies.
I expect when they "open it up" and take 25% in the first year, you'll hail it as a great victory. I expect they'll probably aim closer to 45% which will reward DMG developers.
I mean, I know what decisions I would make to maximise short-term profit.
Yes, centralised control increases their control over their property and things that others make.
Do you remember less than 5 years ago when LGBTQ content was taken down more frequently from DTRPG? Eventually they changed their minds for the better.
Goodness you got that from their statements? Well to each their own.
Can you make your own classes on DnDBeyond?
I'm just going by what they've stated previously and presenting some options on how they could maximize profits by being more open. It's not like this is the only VTT out there, it's not first to market, it is not guaranteed any kind of monopoly. Comparing Microsoft and Windows to a VTT that's pretty late to the party (although that does give them some advantages) is pretty meaningless in my opinion.
As far as DDB, there are limits to their initial implementation of technology, it's likely that's part of why they hired so many people.
I get that considering every corporation is evil is common. I think they are self-interested, I simply see no reason they're going to be super restrictive as you're suggesting. We don't really know though, so I'll withhold judgment until we have an actual release.