[stallmanite]

Just point them at a multipool and you can set it up to auto-switch to whatever "shitcoin" is currently most profitable and auto convert everything to BTC (or your output coin of choice). As someone who lived through the original GPU->FPGA->ASIC arms race it's surprising to me but you can make decent amounts of BTC with just a high end CPU let alone GPU rigs or old sha256 ASICs.