Is it? I suppose you can take their turning down of Microsoft as a token of good faith, but it's also possible that they just think they can cash out for more in the future. If that's the case, then accumulating a massive user dataset is very much the business model, because the business model is to eventually sell the company for as much as possible.
That's strange, given the software's functionality includes showing friends and people in servers you're in what games you're playing, for how long, and even what game mode and so on. There's zero chance they're not monetizing that in some fashion. Almost certainly in aggregate, but I'd be shocked if they aren't doing non-aggregate data sharing behind some very tightly closed doors.
Also, just an fyi that tencent has heavily invested in Discord - though the exact amount is unknown.
Absolutely not arbitrary at all :')