Folding at Home, clearly the best in terms of getting the most out of mining with old equipment. I get about 500 Bananos a month on three laptops. If it were compared with, for example, CryptoTab (which I also run on the computers), I get over 400% USD more with FOLD. Especially now that BAN has risen in price. A big plus is also that you contribute computer power to research for, among others, Covid, ALS, cancer and so on. foldingathome.org #EarnCrypto