Because mining ETC yields less than half the profits. Mining ETH is still most profitable on the 4GB. I got a few running on that lolminer but it runs at 24MH/s. Every DAG the speed slows down by 1 MH/s per DAG, most likely going to use for another 2 weeks and just craiglist the GPUs.

Nothing really worth mining with 4GB cards anymore. There is KawPow which yields like $0.25 after 10 cent power costs. ETH profits are almost triple of that. Then there are days when the fees are high and you can easily make 50-100% more profits.

Just sad you cant mine ETH anymore on the 4GB cards.