Something that may or may not help: varying levels of pressure to make quality posts and comments. So you have a place for low-quality posts and off-the-cuff comments, to help generate ideas and grow some familiarity with stuff in a safer environment, and then a place for actually good content to direct people to later.
LW feels like it’s one of the latter.
Spending time on outsider activities makes it much easier to leave your tribe. In that sense, people who do so really are less trustworthy, because they have options other than helping out when things get tough. People who value loyalty are going to want to be around people who aren’t trying to build the ability to leave them. So, if you want to be around a person who values loyalty, signalling that they are the best match for your skills and knowledge is helpful.