Where there are text/image ads, there are usually ad blockers. I stopped looking at ads on the web years ago and more recently on my phone, too. Those of us that know how, will get around the ads. As others have said, it’s what it does to your community overall that is the real uncertainty. It’s not so big a deal for a distinct tech community of users to decide to shift to identi.ca is it? It bridges Twitter nicely, too, if it matters to you.