Interesting idea. I don't see why not. Consider recurring lifetime costs per user and see if you can set a fee that covers that. Remember that from that point o

Interesting idea. I don't see why not. Consider recurring lifetime costs per user and see if you can set a fee that covers that. Remember that from that point on you depend on new customers (as your paying customers will never pay you again). You might want to look at a one time fee for a year's use of the service, or something like that.