Framebreaker: Websites that break out of the surf frame and replaces it. This category also includes websites that have pop ups and pop under ads.
Illegal: The website has content which is illegal in most places, ponzi schemes, pyramid schemes, selling or promoting prescription medicines, firearms, drugs etc. Cash gifting websites (websites that have direct member to member payments) also fall under this category.
Doesn't display in frames: The site has settings that prevents it from showing in the surf frame. No one can see the website and you would be wasting credits promoting it.
Paid to promote: The website pays users a fraction of a cent each time the link is displayed and the user doesn't have control of what is being shown. Paid to promote (PTP) sites often allows ad scripts, framebreakers, adult material and things that are not allowed here.
Adult material: Websites with nudity or porn. Also includes websites that sell items related to sex.
Casino: Websites with gambling or sports betting.
URL shortener: Services that lets members shorten and monetize their links by displaying additional content for a few seconds before the member's website is displayed. The user doesn't have control of what is being shown and these often allow ad scripts, framebreakers, adult material and things that are not allowed here.
Fraudulent: Websites that are known scams, that do not pay members as promised, or otherwise is not to be trusted.