We've seen this process before. If you don't pay, you are the product.
Their Go plan, which is paid, is getting ads.
Netflix?
Hulu?
Youtube?
Spotify?
Adobe?
Duolingo?
X?
Like if Netflix let showrunners inject ads into their shows and provided a technical platform for that, and the Stranger Things creators added ads to every episode... nobody would be like "it's not Netflix showing ads, it's the Stranger Things creators".