Well they might, like me only need bluetooth, as their computer supports it. Haven't needed to attach more than 1 device though, and don't have an ipad, so obviously i'm a limited user.
Yes, MyWi enables native tethering also.
Alot of people were installing the Mywi trial and after removing it the native tethering worked.
I still like Mywi better over the native tethering cause of wifi tethering that the stock OS doesnt provide.