Thx for the post, can someone please sum it up?

I get as far as:

1. upvoting your own post is always ok no matter what time you upvote as you will always get the full curation reward?
   But this goes against: https://steem.io/getinvolved/paid-to-curate/

Here it clearly mentions that the system is build to stop you from being selfish and voting for yourself.
Has this changed?

1. We shouldn't try and be the first one in to upvote popular content?
   We should wait until 29 mins to get max curation reward for yourself unless u want a bigger share to go the author.

2. Let's say total reward is 50$ for the author what could someone earn from replying to this post.
   Only their own curation rewards? How much of the 50$ goes to the author.

Next to that, why are there not some easy examples/ video's that fully explain how the reward system works, it seems they made it so complicates that only those who wrote the code know exactly what is going on.

It can't be rocket science, but they definitely make it feel like it is.