I'm not entirely sure or coherent what you're saying, but I am admittedly a bit bleary. So instead of a feature that when on the chat has a green light or whatever for other characters to look at the people in the chat to show that X or Y is interested in doing role-play right now, instead we should use the ad system (aka the roleplay ideas as they seem intertwined) as a means to show people we're looking for roleplay?
As far as I understood it, I always took them as suggestions for other role-players to take and use whenever they did approach other people, instead of actual advertisements that say "hey, I'm looking for RP at this instant, approach me!" and more of a "here's a few suggestions as to what we could do together" or "I'm looking to do this sort of thing with someone, so approach me whenever". I think that's a great idea and all, but this sorta suggsetion, imho, isn't entirely side-stepping the ad system at all. It's notion and purpose is to simply tell other people in chats if another person is looking to do role play (or one of their roleplay ideas) now, as they're in the mood/have the availability for it. Basically, instead of navigating from the chat channel they're in to a character's profile to look at their ads, it's just genuinely a big marker under their name that says "hey, I'm online, and I am in the mood/have the time to do RP right now, so it's okay to approach me!", not too disimilar to how F-List uses the drop-down tool to say the same thing. I don't think it'd side-step the ad system at all - like I said earlier, the ad system is entwined with the roleplay ideas drop-down on profiles as it is - so I'm sure people see the ad system more as something people would like to do.
The whole point of it would be a quick and easy way to tell other people that they can do the role plays they might suggest in the ad system now (b/c they're in the mood/have time) without having to either PM to ask them if they want to do it, navigate to their profile to check their ads. i.e., I have an alt who has an ad up, but I've never taken that as saying "I am looking for RP right now!" but rather "this is something I am interested in doing with someone, please approach me about it!". It'd factor in on the ad system and also role play that can be hashed out in PMs through the participants.
Y'dig?