If you think you need to be famous to get sponsorship working you really should consider how hard it is to advertising working. You are mostly making money if

If you think you need to be famous to get sponsorship working you really should consider how hard it is to advertising working. You are mostly making money if you have an insane number of visitors. You don't need to be famous to get sponsorship, plenty of companies are willing to pay at a minimum your cost with a mailing list around 5K people. I actually think that a sponsorship model works much better even if you aren't famous or have many users as you can most probably offset that by giving access to a much better audience.