The example using online platforms that offer services that require many employees, much hardware and resources, has nothing to do with copyright royalties. They do not compare at all. It is utterly unrelated.
It is related. In the sense that one entity is grabbing everyone else's balls.
For online platforms, they keep their third-party providers captive because software publishers would lose a massive market share if not access to those platforms (except when you're a multibillion company like Microsoft).
For WoTC, they (can) keep their third-party providers captive because of the massive surexposition of D&d in general public market compared to 99% other systems that only a very small minority of people know.
Do you think Larian Studios, for BG3, has a license that states they will give "20% of revenue" ? That notion of out of whack.
No, but simply because WoTC didn't have that full agressivity zero stop policy YET. Don't forget that game takes years to develop, and contracts months at least to negociate before that.
BG3 has been publicly presented during summer 2019, game was already in a great enough state for a demo. Development probably started around start, mid 2018 at best depending on how much people Larian could make work in parallel. And I really doubt Larian would have the financial solidity to start developing a project without having secured the copyrights, meaning an optimistic appreciation of negociation delay would put us at mid-2017.
Now link that to the fact that 2019 was the year when WoTC franchise brought more net income than other branches of Hasbro. Add to that the usual "decision inertia" that spans from months in small companies to years into bigger ones... And we're there. There has definitely been a revolutionary shift in commercial strategy. Before, WoTc was "secondary source of revenue". Now it's "primary". So since financials are the one controlling, and they are a special brew of stupidity and cupidity that always go for the short-term all-in even if leaving burnt land afterwards, they started removing all brakes to pump a maximum of profit in a minimum of time.
Also, stuff people create for 5e (campaigns, new rules) do not belong to WotC and the whole shit storm is a gross exaggeration, and I maintain the supposed leaked document contains much noob bullshit.
Absolutely not. This is a classic PR move in business and politics: "publish something on the masquerade of it being a leak if people complain, if nobody reacts, make it legal, if people cry, adjust until proportion of cryouts is small enough not to disturb profit anymore".