A link to the G2G question can be placed in a comment box on the other profile(s) affected by the G2G discussion. This isn't quite as prominent as the link at the top of the profile, but the comment box entry can supply more information about the topic of discussion.
A drawback with adding comment boxes is the limitation of 20 comments or private messages per day. A complex G2G question can affect a lot of profiles, which quickly cuts into the 20-message limit. I've often been stingy about adding comments because I don't like writing a detailed message, then discovering it can't be sent or posted because I've reached my quota for the day.