This is a very bad thing.

One of my consulting clients outsourced their revision control to a cloud Git service. Quite likely that meant that anyone who worked for that service could steal their source.

I use Gmail, but only because I had a hard time figuring out how to install my own SMTP server. I'll be doing that soon, and moving away from Gmail.

It's not like that will prevent my mail from being read in transit, but at least it would make it somewhat harder to snoop on my mail. I will also get less in the way of advertising.