Ethereum ($ETH) cofounder Joe Lubin has formed an unusual partnership with DrumG, a startup founded by several senior level executives from R3, one of the Ethereum blockchain’s most heavily funded competitors. As part of the $6.5 million cash investment by Lubin’s ConsenSys, the company will take a minority stake in DrumG, and Lubin himself will join as the sole outside member of the board of directors.