I have to question the wisdom in this notion. Obviously for any given product offering there is a threshold below which it is not profitable (either because revenue is zero or negative). Perhaps Tucows did some forecasting and concluded that the potential revenues from a service nobody really wants to buy or sell would be outweighed by the costs of setting it up.
Ah ... but you are forgetting the first rule of the dot-com economy:
"Sell at a loss, and make it up in volume!"
- Colin
