Best is this system is broken. There is always a VoIP provider that works with the selected service. And there are always also many services where you can rent

Best is this system is broken. There is always a VoIP provider that works with the selected service. And there are always also many services where you can rent non VoIP numbers for a single SMS for pennies. If paying $0.05 is a form of security we could just charge for registrations as well.