@Soulfox -- I don't know if bread machine yeast costs just a whole bunch more, really. Heck, bread yeast is cheap and I don't care if you are talking about bread machine yest, quick rising yeast or whatever else. Any difference in price would be negligible if you are comparing any bread yeasts at all.
Some people like bread machine yeast because it makes a very simple thing easier. Making bread with a machine is easy as can be, and some people want to abbreviate the process even further. Nothing wrong with that.