They had big infographics that their storage was more than infinity.

https://www.latimes.com/business/story/2019-10-24/gmail-hook...

> A big driver of the shift is Gmail. Google shook up the email business when Gmail launched in 2004 with much more free storage than rivals were providing at the time. It boosted the storage cap every couple of years, but in 2013 it stopped. People’s in-boxes kept filling up. And now that some of Google’s other free storage offers are shrinking, consumers are beginning to get nasty surprises.

That link just suggests people mistook "free tier increases" for "infinite"... which isn't much of a promise