Advertise systems in sigs...what compels people to do so?

[Akvod]

themanwithnoname said:

Khuutra said:
Eh.

Pretty much every time you share your gamercard for Live you're doing an advertisement for the 360, though not in so many words and it's harder to notice because it's disguised as a service rendered to the player.

As to why?

I would just assume that some people care too much about console "loyalties".

That's an interesting point, but I would argue (for me at least) that it's helpful to use if people want to know what your gamertag is, and it's interesting to see what other people are playing.

Showing the logo alone is advertising IMHO. The whole point of brands is for them to get recognized and remembered.