Hi guys! I wonder why do people buy block erupters? They are very weak and you need hundreds of them to make bitcoinBTC. I'd never buy a block erupter. Why do people buy them? 
Sorry, I'm new in the bitcoin business.
Sorry, I'm new in the bitcoin business.Agree, they sucks. But most people buy it to try mining and not for profit. So if you are looking for ROI and profit, please stay away from any USB miners.