Also, how can we be assured the privacy practices of their subscription/payment platform are at least better than the (likely blockable) trackers?
Forming a financial relationship with a website is, theoretically, infinitely more traceable to your personal identity than all the cookies in the world.
Unless the US is joining the EU, telling people to move is not a solution but a side-stepping. Side-stepping problems allows them to continue and grow.
They can, but then that can end up in EU court. If it happened to you, tell the consumer association of your country or your Data Protection Officer. People and companies can do what ever they like, they just have to live with the consequences.
My biggest concern is they will hold your data hostage if you don’t pay or try to leave.
Are golem, pur, spiegel, and others doing so? Have you tried asking for your data to be deleted and gotten a "fuck you we won't" or no response at all (which is also the equivalent of "fuck you we won't")?