I think the strategy is getting in a central position in people's communication; they also have a huge user base; perhaps that doesn't justify 850M but those ar

I think the strategy is getting in a central position in people's communication; they also have a huge user base; perhaps that doesn't justify 850M but those are some things to look at. Wherever someone has this big influence and strategic position, they will have big chances to leverage them and make such investment worth (especially if the founder has a proven business-runned mind).