Makes sense to me...it won't get anyone to pay more for a ticket - hey if I wanted to pay more, I'd just fly on United

but it would get last minute travelers to look to WN. When I need to travel within the next 7 days, I'll go to a legacy carrier first becasue their rates usually aren't too much more, if any, than WN and I don't need to worry about staying up to print a BP or getting to the airport early so I can get a comfortable seat. Giving full fare pax the free group A boarding would help increase this option.
actually, I thought WN was going to allow you to print BP 24 hours in advance of your flight. I haven't flown them in a while, so did this not happen? United and others allow you to do this, so why doesn't WN? It can't be that hard to impliment.