[mcherm]

Would you expect Google to send emails to people whose addresses have been entered into Gmail?

[Karunamon]

No, but that's not what happened here. You filled out your personal card which will be shared out with everyone you "bump" with. I haven't used the app, but I'd assume this fills some kind of registration function.

[jonny_eh]

Bump emailed the guy that used their service. Your stretching the analogy a bit much.