. Fong KPCB Holdings, Inc., as nominee do Kleiner Perkins Caufield & Byers 2750 Sand Hill Road Menlo Park, CA 94025 Apoletto Limited [address] Deutsche Telekom Venture Funds GmbH Gotenstrasse 156 53175 Bonn, Germany Attention: Georg Schwegler Hedosophia Alpha Limited Company Number 54563 Roseneath The Grange St Peter P

: 625,771 $4,500,000.61 1221982 v8/SF EFTA00287029 SUBSEQUENT CLOSING DECEMBER 15, 2011 AGGREGATE PURCHASE NAME AND ADDRESS SHARES PRICE Deutsche Telekom Venture Funds GmbH 1,390,602 $9,999,999.76 Gotenstrasse 156 53175 Bonn, Germany Attention: Georg Schwegler TOTAL: 1,390,602 $9,999,999.76 SUBSEQUENT CLOSING M

. Fong KPCB Holdings, Inc., as nominee do Kleiner Perkins Canfield & Byers 2750 Sand Hill Road Menlo Park, CA 94025 Apoletto Limited [address] Deutsche Telekom Venture Funds GmbH Gotenstrasse 156 53175 Bonn, Germany Attention: Georg Schwegler EXHIBIT B VOTING AGREEMENT 1222102 v4/SF EFTA_R1_02058552 EFTA02698270 TABL