E-mail marketing or SPAM, sells and there's no doubt about it.
I have been in and around the "shady" part of the business for well over 3 years and I haven't seen a drop in productivity. What I have seen is every kid on the block jumping onboard thinking it's a goldmine.
Abusing other people’s resources, exploiting relays etc... You want to mail and keep it legitimate then you should honour your removes, mail through your own server and keep it as clean as possible.
I have my fingers in a few things and spam is one of the most profitable, it's a part of business and we have to live with it.
