He can't relicense as WordPress is a fork of B2 which is GPL. That's one reason why he's trying to extort instead.
I don’t think the fact that it’s a B2 fork is relevant. He wouldn’t be able to relicense even if it wasn’t a fork but initially chosen GPL.
alt Hacker News
I don’t think the fact that it’s a B2 fork is relevant. He wouldn’t be able to relicense even if it wasn’t a fork but initially chosen GPL.