Twilio will be a problem. Twilio no longer comprehends that there are non-advertising SMS applications. I used to use Twilio for something that just responded t

Twilio will be a problem. Twilio no longer comprehends that there are non-advertising SMS applications. I used to use Twilio for something that just responded to incoming SMS messages. Then they changed their rules so that I had to register as an "ad campaign" and pay extra fees, even though I didn't do anything outbound.