Amazon is throwing its weight behind mobile eSports yet again. The company -- the Amazon Appstore, in particular -- is the main sponsor of the 2016 Vainglory summer eSports season. Vainglory is a multiplayer online battle arena (MOBA) game for touchscreen devices, which Apple demoed on stage back in 2014 to show off the power of its A8 chip. It has become the biggest touchscreen eSport since then, convincing Amazon-owned streaming website Twitch to ink a deal with its publisher, Super Evil Megacorp, to broadcast its tournaments.