[1] yes I think that is true (but i will test this soon in a future article)
[2] you mean upvote others? probably true (i dont know if there is an API that gives you the data necessary, and compiling it manually would be horrible)
[3] i also think this is true, but it would be hard to compile the data, unless there is some API, let me know.

Yes I will do more tests in future articles, but especially working on the data of @kaylinart or @stellabelle with many posts.