You can now adjust what types of posts show up on the main page by clicking the "gear" icon and checking categories. It's useful for people who think the site talks too much (or too little) about politics, religion, etc. Eventually, we'll try to include "favorite tags" to improve the sensitivity of the algorithm.
I also don't get this 'activity' window.
I do not really understand what "show more" does: which of the posts are we not seeing already? How is the selection made of what we see and do not see by default and if we check all the "see more" boxes? If we check all of them will we see all the posts that exist?
Good question. Not all posts go to the main page. If there are some have been asked a few times recently, they go only in the category list (and on profile page). We also try to have the main page have different types of posts. Also, if someone posts 3-4 posts in a row that are about the same topic, 2-3 of them go on the category page only. If you see "new" on a category, that means that the most recently post there hasn't yet been seen by you. Complicated, eh?
When you tag a post with "hobbies" it only displays "#" and not "#hobbies"
How cool! I appreciate your efforts and I'm enjoying being here!