I don't think that the Register or the host towns are being hurt by non-registered riders, but non-registered riders do use the porta a pots, add to an already congested traffic situation, etc. The limit on the tickets is not because the Register doesn't want more money, it is to try to control how big the ride gets. I always make everyone in my group register for RAGBRAI because it does cost money to put on RAGBRAI. I don't mind someone hopping on for a day, but there are several groups out there that have the mindset that since they are not camping in the campgrounds that it is okay to not register for the whole week.