http://arstechnica.com/gaming/2009/02/left-4-dead-sees-3000-jump-in-sales-on-steam/
Old but worth a read ;)
Digital sales generate a metric shitload of revenue, the same article seems to crop up every now and again when 'X' title goes on sale.
I see it as a good thing, more money inbound means more scope for changes in-game and so on, lets face it, we paid to support the development, and now they'll get even more income and hopefully add things that would be prohibitively expensive otherwise :)
And as for the people butthurt over paying full list price, BAAAAaaaaaaawww! You saw the price of entry, made a value based judgement on that and took the ride, if it didn't seem worth the money then you wouldn't have ponied up right?
Now people who looked at the initial entry cost and felt it wasn't worth it may view otherwise and will soon be complaining about KOS and glitched out zombies in no time at all :D
Fresh friendly blood is never a bad thing, especially at this juncture when people seem more concerned with exploring new features and being more social, rather than just spraying ammo all over Berezino at anything that moves.
People may actually have a good start for once!
This may actually be good for the community as a whole.
$0.02 and all...