I cannot for the life of me find it, but the section of the Corp Advert that included a link to your recruiting channel was removed, citing that the channel could simply be linked in the Advert Text.
I attempted to link our forums, In game recruiting chat channel, as with other MOTDs or Messages, and it simply blocks out all of the text, including the link and text of the channel or web page itself. I tested it and did not hit the character or line size limit for the advert text, but simply had to remove the hyperlink and the in game chat channel link. I also tried linking one, but not the other, this also did not work.
Please let us know if this is an issue or an intended occurrence. There is currently no way I have been able to link it in the advert itself, but can type out the channel name and web address for people to search.