I run a Netherlands-based startup. I'm pretty sure that all except one our angel investors did it so they tell people about it at barbecues. Some of them even

I run a Netherlands-based startup. I'm pretty sure that all except one our angel investors did it so they tell people about it at barbecues. Some of them even proudly use "we" when talking about the company (that they have no influence over). As in "we just hired a new head of sales". I'm pretty sure that's a different vibe than what SF angels do, but seems to me that there's plenty places where angels invest primarily for the social signalling.