There is an adverse selection problem: the users who would pay are probably the richer -and most profitable- ones. The only equilibrium is a very high price to

There is an adverse selection problem: the users who would pay are probably the richer -and most profitable- ones. The only equilibrium is a very high price to opt out, far above the average revenue per user, and essentially nobody would pay for it. Insurance has similar problems since a long time: search for Stiglitz and “unraveling“ for literature on the topic.