spammertising 

The act of using spam to advertise.

We used spammertising to reach 27,000 un-knowing potential lawsuits, er, customers.

spammertising by JustinMacReRe April 18, 2013

spamvertising 

Form of online advertising that uses spam-like tactics in ways not usually associated with spam. We know about spam in snail mail, e-mail and enwsgroups, but this is a much wider problem:
fake blogs, comments on websites that allow visitors to comment, shell sites, etc.
For some reason, these guys reckon this form of advertising is worth their while. I'd be willing to bet a huge sum of money that less than 0.01% of advertisers who use these tactics actually make money, in fact the majority probably lose money plus the time they've wasted setting it up. Spamvertising just pisses people off, it certainly doesn't make us want to go and spend money on whatever heap a shit you're hawking.

just look at many of the current blog posts on www.weblogs.com
or the waves of spam comments at blogcritics.org

spamvertising by b0Bz0r3llo March 27, 2005

spadvertising

1.Spamming and Advertising combined.
2.A phenomenon often present on internet forums and communities, which can be really annoying to both members and staff (moderators and administrators).
3. Repetitive ad posting on a forum by a series of accounts created solely for advertising, often by companies like UMG-D.

Oh damn, yet another UMGD intern registered and has already started spadvertising...A moderator should act soon.

spadvertising by Manos, the Mage September 1, 2009