I would like users to send bulk text messages for my website. I don't want to pay per text charges. I don't mind paying for a software package or a monthly service integration per say to allow this.
Basically, I want the majority of the costs upfront and very little residual costs. Some users may send 5,000 text messages a month, some may send 50,000. I need a way for the user to send these text messages with the mobile phone numbers they have collected.
How is this possible?