Since she works days, busy circuits are rarely a problem for her. But, the economics are. The reality of the peak usage is that her ISP has to be able to increase capacity. This is expensive for a business with a poor cash flow. Funding for ISP growth is not easy to come by.
Banks are reluctant to lend to a business with a continuously negative cash flow.
The stock markets will not support smaller ISPs. Most owners do not want to sell to companies with extra cash, and most companies with extra cash are reluctant to invest without stability. Owners complain that the traditional funders do not have faith in the concept, that they are applying old models to a new business. That may be true, but it's also reality. It does not help Bloxham's ISP to keep her site running.