What is Spamvertise?
The term Spamvertise means using spam to promote a website, product, or other project. This portmanteau of "spam" and "advertise" is often used derogatory to talk about unscrupulous advertising.
In general, spam advertising will result in a red flag on the website in question. After this website is blacklisted, hackers can attempt to tamper with other clean websites and spam them. This is often done through a system of hyperlinks in the emails themselves.
Security experts have introduced special tools such as Wordfence to combat the practice of third party spam advertising. In general, email services use Bayesian algorithms and heuristics to find and isolate spam email.