Ok, I can see the problems with frequent billing meaning that you have more opportunities to fail to take payment, the basic premise being that you are minimizing the risks and the work needed to suspend many accounts if they don't get paid for. But again if the customer is really happy with what they are getting I think they are less likely to let payment slip, unless they are struggling financially at the time.

I have never heard of lifetime hosting before and see huge problems potentially. I am glad it works sometimes, but if a company is struggling and thus needing to use a scheme like that, I would not be wanting to hand over a large chunk of money to them.