Reconnecting through Dreamwidth

This is not urgent nor a priority, but it's been on my mind so might as well ask: a post on DW's etiquette. For example, is it better to drop someone a comment in their sticky post before subscribing to them? My first instinct was indeed creating a sticky post on my own journal, why do we do that? How do people use/fill their profile? Is it polite to just randomly comment on a post if you've never interacted with someone? What about sending a PM? The implicit encouragement to credit icons instead of just saying you found it on the internet, the approach to image descriptions in the alt text, the different ways people subscribe/grant access, etc.

Is it too broad of a topic? My main thought is that DW is a blogging site, not a social media site, but is there anything that would be considered a faux pas in the community?