Sorry, I don't have an answer to your question.
I'm just curious though. Did the owners of all those 200 numbers give their consent to receive text messages from you? Because the way you described your activity sounds a lot like text blasting which is also a form of spamming.
However, if those 200 numbers were signed up by their owners to receive promotions from you, then you're totally fine. I hope someone here can help you.
Yes they have given their consent to receive this promotional text messages.