This obviously violates every carrier's terms of service, at least in the United States. There are industry-wide accepted rules about this; regular local long c

This obviously violates every carrier's terms of service, at least in the United States. There are industry-wide accepted rules about this; regular local long codes are not allowed for A2P messaging. Your A2P texts will be blocked long before you get to 250,000 texts in a month. I would bet that you don't even survive the first day. You're just flying under the radar right now because your volume is low.