Treblaine said:
Last time I read the Steam EULA if you don't play by their rules they will ban you and you will lose your games too. And I've never known anyone to be banned from the PSN outright and have their stuff stripped from them either, I was banned for a week because I got reported for telling a troll to go die in a fucking hole and they never stripped me of anything.
As for stores on PS3, you're right, there is only one place to buy digital titles from, though (at least in the UK) you can buy keys from other places for less quite often. Honestly with the exception of indie titles and download-only games in the £5-£10 bracket you'd be insane to pay the publisher dictated £60 for the game rather than toddle out to the shops or order from Amazon cheaper.
Or just buy a retail copy from amazon, shopto, zavvi, game, gamestop, etc.
At least you use GOG when Steam doesn't give you a good deal, there's no need to rag on Sonys store, apart from for the atrocious new UI they forced upon us all recently.
If the store rips you off, it's your fault, there are plenty of alternative ways to get your games, consumers need to be aware and if you think a price is unjustified then by all means, vote with your wallet.
Example: I think that Dead Space 3 charging £45 upfront and then having the audacity to have day-one DLC, an online pass, DLC within a month of launch, and microtransactions, is taking the fucking piss, so I'm just not buying it.