I don't really think you will get that kind of rates atm. One of the biggest reason, is, it is not clickable. Second is if a lot of members wear the same brand logo, it will annoy other users. And it may not bring good publicity to it.
But there are ways in which it could be done and kept under control, but then the efficacy will go down.
I think the OP will pay (if he will choose to start the avatar campaign) the same rate for Full member and above, essentially because they can put the same avatar so there is not a real difference between the ranks... or am I wrong?
I agree with you, the avatar is not clickable but it will be the same effect of the tv ads. Here the important will be the views not the clicks and I don't think the staff will be against this option (but the final choice is from the admin).
Wow, guys you are clever, I forget the avatar is not clickable, good idea. So the static avatar couldn't get big traffics to the website unless it's clickable, it's similar to TV ads or street ads, the promotion is limited.
But I am not sure TV&street ads and internet ads, which one is more efficient?