This has been a concern to us also.Oh, I think that will 100% change.
They will want you playing on DND's VTT the instant it's implemented. They'll shut down the Beyond20 browser extension. They want your monthly subscription on their VTT. They aren't going to let a free browser extension take that from them.
I like the Beyond20 extension, and I buy books on Beyond, so I was hoping that was enough profit for WotC to keep allowing it, but I'm not sure anymore.