I have to disagree with this. Allowing the most custom/best maps to charge means more talent will come to make maps and more artists will join. This in turn will give us way better custom maps which are super cheap compared to full-on games that you stop playing in a week.
Red Circle TD was around during beta, and its still very popular. Likewise nexus wars.
Good games come from quality, and quality comes from inspiration and good will, not greed.
Besides, who's going to judge which maps are good enough to be premium and which aren't? Perhaps they'd have to go through blizzard first, but i can't think of a way blizzard won't try to make a profit off this.
Also, it's funny how people had an issue paying $60 for this game and now they have an issue MAKING MONEY off of it...
If i play this game for as long as i played starcraft 1, then you definitely get your money's worth. But i don't, nor ever had, plans to invest into a video game for additional unofficial content. That doesn't mean i would pay for official blizzard premium maps, out of principal. It would just mean to me that they're trying to milk this cow dry. I'm only paying for official expansion releases. Yes, i could just steer clear from premium maps, but fact that it will be allowed will mean a reduced amount of free custom maps than otherwise would be available. I wouldn't be surprised by the number of greedy people on battle net.
Free maps will only be so good... adding money to the pool will up the game quite a bit.
Again, referring to quality, its not greed that makes a game good.
Besides, i don't know if you played sc or wc3, but you're saying that all the maps available on those games were sub-par because the editor didn't have a monetary return from his time investment?
I can see where you're going with maps that perhaps have excellent dialogue and a cinematic or 2, or even a lengthy campaign, but still, i was never a fan of monthly bills for a video game, let alone paying for additional digital content.
Look what happened to diablo regarding items, where there's sites dedicated to the sale of those items. That ruined the game.