I get hundreds of these emails a month. I've learned to just ignore them and clean my inbox out of this clutter. Just delete. (sounds like a Nike ad). No one is going to offer you the opportunity of a lifetime with a message starting with "Dear Sir" or "Dearest Madam".
And by all means, no matter how angry you get at these guys,(and it could just be a handful sending zillions of emails), DO NOT REPLY. Once you reply, you're in their data base and they got you!
Aloha,
Rich