Personally I'd be fine with allowing it in bios only. If people want to see more, they'll check out the bio, and see the link there. In other cases someone will just be like "... Nice." without feeling advertised to.

In the end, it's all about the rules the community itself puts up. Personally, I get more enjoyment out of fewer "real" (imperfect/amateur) out-of-love quality, than more perfect/fitgirl for-profit quantity. But I'm aware this is generally a minority opinion.