I have a gripe against Twilio. Aside from their China service sucking, they keep sending me newsletters or emails that are tailored to look like they're personally written to me. The subject looks like "RE: Twilio's Developer Community" and then the text preview in gmail looks something like "Hi Joe, I wanted to drop..."
Effective at getting me to open the email, but I always feel deceived when I open it up to see the cookie-cutter mail that they've sent me.