As an example I grew up in a poor farming town in the Midwest. Everyone drove an older pickup. Occasionally someone's truck would break and they'd buy a new one. It was the gossip of the town, look at Mr So-and-So flaunting his wealth, his farm must be doing great, what's his secret, why is he showing off? A few years later his truck is dusty and dented and rusty but someone else's truck breaks and they get a new one, and now they're the talk of the town.
Recently I drove back into that town in my BMW... I should have known better. My grandparents called me afterwards to let me know how everyone in town is talking about them, my grandparents, for raising such a braggart of a grandson that he'd drive around town in a BMW. Doesn't matter how much money you have, you don't buy a nice car because it's self promotion.
Not saying it's right or wrong, but some cultures try to avoid people who brag about their own accomplishments. This goes hand in hand with other comments saying they wish they could nominate someone because some people would never nominate themselves.
