There is absolutely no reason not to enjoy the perks of the early stage of the customer acquisition process;

I can think of one reason. Depriving the existing industry from revenue leading to its demise which ensures the new entrant can raise their prices higher than the preexisting status quo. This is the other part of the equation that makes dumping work. Of course we can’t expect most people to choose to pay more but if people were able to resist that, the strategy wouldn’t work.