If you're constantly the high tipper in the room, other people may feel like they don't need to tip her. But I would honestly suggest discussing it with your model and finding out how she feels about it.i'm in a models room most evenings would this put other user off?
I personally love it when I have a lot of people participating because everyone feels like it's a team effort.
I had a fan club member complain about another fan club member about two weeks ago and I explained why that one person was being so extra that day. The complaining member understood and continued to play but had he not felt comfortable saying something he would have left and I would have no idea why.