Nick333, most definitely. It's risky business though.
As for what you said HellTel, while there is some customer loyalty on the forum, by and large a lot of the users here are the ones that will go to the cheapest provider, regardless of how long they have been with the previous one. We lost a fair deal of users who were on the 30GB accounts for R199 to competitors when the new pricing structure came into effect. And in this case we were most definitely running at a loss. I personally don't feel the statement "help me today and I will return the favour tomorrow" exactly applies.
One might say that the people here on MyADSL are the more "astute" ADSL users, always shopping around for the best deals, but it also means that those users are not the "primary focus" of a business wishing to profitably sell a product as the user base from MyADSL tends to be very fluid. I can assure you if we came out with a 10GB package @ R200 or something, those users who left to go to the cheaper provider would most likely come right back because we are now the cheapest - in that sense these users are definitely a "minority". I could use an example of Telkom in this sense, but it's different with them as they do not have a "competitor" to which unhappy users (or a fluid userbase such as MyADSL) can go to, so like them or not you're stuck with them. But I can assure you that if there was a competitor, they would hear what you have to say, but it does not necessarily mean they will act on it, because no large company is going to pandor to a market that is not going to be profitable in the short-medium-long term, and MyADSL users are generally not what one would consider "profitable" - at least not directly.