(q) engage in commercial activities without enrolling in Yahoo-approved affiliate programs. This includes, but is not limited to, the following activities:
offering for sale any products or services;
soliciting for advertisers or sponsors;
conducting raffles or contests that require any type of entry fee;
displaying a sponsorship banner of any kind, including those that are generated by banner or link exchange services, with the sole exceptions of the GeoGuide Banner Exchange program and the Internet Link Exchange; and
displaying banners for services that provide cash or cash-equivalent prizes to users in exchange for hyperlinks to their web sites.