They literally don't want you to spend your money changing sides.
Of course they do. Their market research tells them this is what they can squeeze most
suckers, er players for. It was like the pay per view thing for Blizcon. This is a process they could easily accomidate for free, but choose to charge for. ActiBlizz is soon going to start charging for just about everything.
"I like my coffee like I like my women. Black, with a side of prune danish." - Gilbert Gottfried