I noticed that pressing "Share This" under "Commit!" button produces a referral link.
While itself it's good (it allows to see who invited a new user), IMHO it can be even better. I'd like to see the following feature:
To be able to specify some string when generating referral link; this string is encoded (steganographed) into URL; then when somebody commits using that URL, I'm able to see the string (this allows be to assign different tags for URLs that I publish into different places, and thus to see what invitation way appears to be more effective).
What do you think about it? Would it be something useful? Or just useless developers' effort?