Are there any websites where bitcoin holders can invest their money? Such as by buying shares or giving out loans. For example there is a ShareHolder service for WebMoney. Is there something similar for Bitcoin?
I use cgminer on Ubuntu 12.10 to mine bitcoins in the 50BTC pool. I have three workers set up. If I run multiple instances of cgminer, each targeted at their respective workers (1, 2, and 3), would this increase profits or just waste power?
I notice this because cgminer only uses about 80-90% of my GPU (Radeon HD 6570) anyway.