I would suggest that VOIPo makes this restriction on home wiring much more prominent during sign-up process. You may have mentioned somewhere in small print but certainly not with the prominence it deserves. You seem to be the only company that has this restrictions (I am sure you will find another one; but I asked VoicePulse and PhonePower - and they said they don't prohibit). And Time Warner advertises that they will come and make sure that phone jacks work the same way they work with your [PSTN provider].

Anyway, this doesn't apply to me personally - I haven't used home wiring for almost a decade (it probably doesn't work, anyway); and I use BYOD adapter. But I've seen several threads here and on DSLR where people complain about this issue. Got to be more transparent - it's good for business!