Want some passive income? Japanese firm GMO announced on Friday that Cryptoknocker will let anyone with GPU chips mine Zcash (ZEC) and other equihash-based cryptos. The free-to-download software is designed for everyday computers that have NVIDIA graphics cards installed (GeForce 8 or later).
GMO said in Sept. 28 statement that it will charge 2% of all cryptocurrencies harvested but said their fee should be offset by efficiencies gained from their mining methods. For potential miners who may be interested, no.