Quote from: Triton on December 04, 2013, 04:16:23 PM

Sarcasm? how many bitcoins do u generate a month and what's the hash rate?

You need to take 2 things into accounts:
- There are a lot of other coins beside bitcoins. As Kronus87 suggested, it might be more worthy to mine other SHA-256 based coins and trade them.
- Price of alt-coins is constantly going in up. The 0.01 mentioned are currently worth 10$. Next year, these might by worth 20 or 30$.

Quote from: Triton on December 04, 2013, 04:16:23 PM

But USB miners are supposedly way less powerful than even GPU miners. And you only mine when you use the computer hence the 0.01BTC is quite good.

Depends. Smaller USB-key sized miner (like block errupter) are mainly targetting efficiency. They don't output a lot of MHashes/sec. But on the other hand, they consume only a very small amount of Watts.
For serious mining, miner tend to use a big quantity of them on a big multi-port hub.