"C&W purchased Bulldog for £18 million originally, and has invested around
£250 million in the company. To date this investment has brought in around
80,000 customers, or you could say each customer has cost £3125, which means
a very long payback period. It seems some of the worries are that the UK
broadband market may hit saturation point soon, and leave suppliers simply
fighting over the same users all the time. Generally when that happens
prices end up driven down, making it ever harder to regain the sort of money
that large LLU investment will take."
More on this at
http://www.adslguide.org.uk/newsarchive.asp?item=2538