well its understanding if they plan to make db3 and sc2 last a long long while with updates / patches (mmo style, instead of buying an expansion)
if they charge, say a subscribtion fee, then i can see something like xbox live. 40-50 a year and that includes access to sc2 and db3 (and any other game that uses the new bnet) on bnet.
but i do believe they are just trying to attract some ads and stuff of that sort because i know that blizzard knows the people like it free to play on bnet







