I got an unsolicited email to check out a Github project once and I didn't mind it. I ended up looking at the new project and it was neat. What made this one so irritating?
So have I - "I saw your project X, thought you might be interested in this." That's one thing--personalized, actually in the context of what I've done and detailing why I might be interested.
"You starred Play so come look at our thing" is not. It's an email blast. It's spam.
"You starred Play so come look at our thing" is not. It's an email blast. It's spam.