Sorry, gentlemen, but I can't see it affecting the way I use it much, myself. The only time the updating frequency is important to me is when I'm tracking a vessel inbound to film it, so I'll just have to give myself a few extra minutes to jump in the car.
If I were using it professionally, I'd expect to pay whatever fee I needed to, to use the system in the way that I wanted too, so I suppose that if you are using it recreationally, but in a professional way, as I'd expect you are, I'd expect to pay, too . . . sorry.
Registration seems a small thing for what you get for free, anyway.