I'm working on the finishing touches of an application that's main feature will be sending out real time SMS notifications. For the purposes of this question, I'll use the example of a sports score text message update service (Not my actual idea, but similar in function).
I'm planning on offering two different account options, one free, basic, and ad supported, one paid, customizable, and ad free.
The free service would only send messages like "the score is now 7 to 3" while the paid version will have options like sending a message saying "Manny Ramirez hit a double for 2 RBI's".
So my question is, what kind of monetization options are there for the free account? I've contacted www.movoxx.com, a company that embeds 40 character ads into every text you send, and that seems like a good option so long as they accept my idea and allow me to sign up. Does anyone have any experience with them?
The service should appeal to users who are looking for a good amount of SMS updates so there's a potential for sending out thousands of messages a day if the product catches on.
What other options are there for SMS message monetization?
I'd probably go for something like a free trial 10 messages, after that sign up and start paying. Just stick with the single paid account.