Don't forget theres a decimal point in there. 286 wu's a day isn't that hard if you figure a good machine these days will produce nearly 8 wu's/day. So that would be maybe 36 possible systems cruching SETI. They could be work computers , school computers , some personal and maybe friends/family computers. I'm not speaking for Norko's total specifically on how he does it but thats how many big producers may be doing it.