Nice explanation by you but from your post I think you have a concept in your mind that the rewards you are earning here you are mining basically so it's not correct just like other cryptocurrencies steem can be mined but in a different way because STEEM tokens can only be mined by top 21 witnesses and others users can't mine STEEM so it's a wrong concept you have in your mind brother.

You have a good understanding of the mining methods and I really appreciate all of them all these are the good methods of mining but a person can only do mining if we have a good hardware and software access because my name requires a lot of your energy as well as cost.