I don't have instagram so can't see his activity but simply using that as an example, you earn about £200k per 1m followers you have from brand posts at the upper end. I googled him and he's got 5m, for a reference point John Stones (a better, more marketable and more successful player) has half of that. United is a monster of a brand. It's kind of sickening when you think about it, when footballers go on holiday they'll likely pay for the holiday 5x over simply by sharing a pic of the hotel - if you play for the massive clubs like United, Barca, Real etc. you are at the top of the pecking order.