> I understand "free services" eventually come to the conclusion of either charging or using ads to finance and even make money out of them.

The endgame is not "or", it's "and": eventually come to the conclusion that, why choose between revenue streams when we could just have both?

I think we'll see companies increasingly adopting the X approach: charged tiers for 'fewer' ads. With no actual guarantee as to the absolute quantity of ads, just 'fewer, relative to the people who aren't paying as much'. We're basically on a downward slope where not seeing ads is going to get steadily more and more expensive over time.