In some case they may, but they loose customers like myself that need to use more than one computer, it is a question of functionality.
Besides having a dongle on my laptop is a minor inconvenience, not a major show stopper, which is what always makes me wonder about those anti dongle posts … when evaluating some piece of software the minor inconvenience becomes a major factor in peoples purchase decisions over and above functionality?
Imagine if you were a tradesman in something other than music and would refuse to do certain jobs or service certain equipment because you do not like the dongle that came with the software. How impressed would your customers be?