Thank you for your comment. Unfortunately for our prospective clients, there is not a significant amount of wiggle room for SMS pricing in particular due to high VAT and telecom fees. If you're interested in purchasing large quantities of BTC through DialCoin, a much better value would be mobile or landline phone charging. Not only are rates better and taxes lower, but the price ceiling is much higher as well.
SMS is more directed towards those who wish to deal with greater anonymity, are in need of small values in a hurry, or those who cannot purchase bitcoins by the usual avenues. It's also quite beneficial to mobile subscribers as they can liquidate their unused SMS credits at the end of the month.
Okay, that makes sense.
I will have another look when the other payment methods are available in my country.