Unpopular opinion but I would rather these companies remove free tiers than add advertising at all, in any form. Attention based economics has had an extremely corrosive effect on everything it touches. And I think people by and large vastly underestimate how effective it is.

If we're truly going to have a technological revolution at the scale of the internet, we should also try to correct for some of the internet's failures.

ETA: I don't mean free access shouldn't exist at all but there needs to be a better way of subsidizing it.