Hey, my domain reg company i'm using doesn't "allow pornographic material" on their domains. But if I re-direct to an offer, that doesn't count since its going to another url right?
Is the domain registration company the web host also? If not, and it is the web host that has the rule, you are fine. I don't think the domain registration company would say anything... except maybe a Tonga or Middle East company... Or religious...
I'd be careful, some registrars do decide they can make decisions. Case in point, GoDaddy.. wow, they are extremely nasty.. it's all for another buck though. But they'll disable domains because of spam accusations.
If the redirection is done properly you'd never even notice.
I have redirection on some parts of my main site because I wanted to have a URL to connect to my own server (too lazy to learn the IP address by heart lol). It does not show at all.