It is a complete misunderstanding of what TTRPG players want and need. This is mostly because they are so focused on profits instead of their player and creator community.

If they really cared about their community they would have just created an API to access the rules and allowed third parties to pay for access. Then we would all have the ability to move to various 3rd party services and keep access to the rules and supplements that you purchased. They would have also created an open market place for 3rd party vendors to sell new content on the same system. Those things serve the community.

If they had done that first and then decided to provide a virtual table top that also competed in the same marketplace, I’d be more OK with it. But that doesn’t seem like that is what they are trying to do. They are building a walled garden. I’ve seen every walled garden fail under its own stupidity or weight, or both.