I too think there will be a lot of people producing whitelabel contentId clones. I mean, it's a potentially good business. But it won't be easy to do, as people will still need to convince copyright holders to play with it, much like it took decades for something like spotify to emerge.

Anyway: the law will stay unclear for years, won't it?

This is a directive, which means each EU country will need to implement it through a local law, and then they will still be free to implement it the way they want it (unlike GDPR, which is a regulation).