This isn't a Google service. This is a Area 120 service, big difference.
Area 120 is an incubator. Tons of their products don't make it to the public.
Clickbait article :/.
I tried Blitz ~a year ago. The developers were very friendly and were quick to address an issue I posted on GH.
But I eventually (after ~3 days) switched away. Blitz does what it says it does well, but when you get to that level of abstraction it feels like you lack control of your project. I assume that this level of abstraction would coincide well with newer or less confident developers.
I think the writers decide if it is paywalled (if it is they get paid). Still would prefer just having ads but I guess adblock is too popular for its audience.