Vserv.mobi enables advertisers to reward consumers with mobile recharge for engaging with brandsInMobi introduces native advertising on its platformSnapdeal goes multilingual, launches Hindi and Tamil versionsFacebook Q4 revenue up 63% to $2.5B, net profit at $523M; 61.5% of 1.23B monthly users access dailySouth Africa’s Mxit launches instant messenger service in India to take on WhatsApp, others