Glu Mobile Inc. announced that the company will invest up to $7.5 million in promissory notes convertible into a minority equity stake in Plain Vanilla Corp. As part of this investment, Niccolo de Masi is joining the Board of QuizUp and Glu has a call option to acquire Plain Vanilla for 15 months from the closing of the initial investment at a pre-agreed price. The companies intend to partner in monetization of QuizUp's sizable and diversified global audience of daily active users through cross-promotion, increased in-game advertising and new game features.