I mean, the obvious answer is "pay people to use their work and let them opt-in for it". This isn't a hard problem, it just has a solution they don't like.
My business model of having a fast food restaurant where grocery stores give me ingredients for free and I have workers I don't have to pay also doesn't work without me being able to get free access to things other people have to pay for, but you don't see me crying to the EU about it.
But...but...but....
That means their ability to generate profit disappears!
Because, like all "good" start-ups, they basically only work because of VC capital being pumped in to shore up the money bleeding out.
If they have to start paying for all their stuff now, like some kind of "real" company, it won't work!
Oh wait...
You're telling me that's how it's supposed to go?
You're telling me that companies that can't find a balance between money in and money out should die?
Oooooooooooooooh!
XD