You saying our identity ain't that safe with regular bitcoins?
Well it is safe, on the side when you spend your bitcoins, but when you purchase bitcoins it is recorded, and many sites require identification. Well paysafecard is just an option, for paranoids, or who dont have bank account, and so far I only found this site with PSC option, which is great I think.
Just in theory : If you buy Bitcoin under your own name, it is recorded. When you transfer your coins to buy stuffs it is recorded (here you can searhc the transactions http://blockchain.info/). And if the seller will exchange the coins to money on a site where they record his name, from the wallet where you sent the money, then you are trackable. But this is only a small chance, and this is not possible on the .onion site (because the coins are split and sent in multiple transactions via different wallets), so there is nothing to worry about it.