The "catch" being: "Zeep Mobile supports this service by attaching 40-character teaser advertisements to each message sent to your users' mobile phones. Your us

The "catch" being: "Zeep Mobile supports this service by attaching 40-character teaser advertisements to each message sent to your users' mobile phones. Your users have the option to respond with the appropriate trigger word to receive more information about the advertisement." I'm not sure what this has over http://www.textmarks.com/ http://www.textmarks.com/ -- which seems more flexible and has been recommended here (mind you, I haven't used TM so maybe they send out ads too -- but there seems to be nearly 1000 apps running of TM already).