Utter balls.

Cardboardfish. The website that lets you text a friend in exchange for an add pop-up for a product you'll never want. Sounds like a deal. Until you try to send your friend that all important "hey, urgently need to contact you, but no credit" text, when it will curl its toes up and die, claiming the service will re-start in 10 minutes. So you wait, and go to send another text. Oh but wait, now it decides "nope, you can't send that, it is a duplicate of the previous failed message and I suspect it of duplicate spam" at which point all your plans go to hell in a hand-cart.

Oh and don't bother re-writing your message or digging out the thesaurus - it won't work. Your message could be the polar opposite of the previous one and it will still refuse to send it because it detects it as a duplicate.

Quite frankly I think you will have a better time catching a feral pidgeon, tying your message to its leg and just PRAYING the pidgeon actually even goes vaguely in the right direction. Your message will stand a greater chance of arriving and will definitely beat CBFSMS to the recipient.

Whatever you do. Never. Never ever. Never in a million years give cardboardfish any money or custom. Do not recommend them, do not speak of them fondly. Because whether you do or not, I predict all you will get in return is Error 500 - CBFSMS has screwed its brain cell and suspects all your messages of being duplicate spam.