You do need to put more work into it rather than making minor changes to existing idea and trying to earn from there. It is innovation that gives business a boost, not imitation.
That is a user created content, it's not official. Imagine if bitcoin is a country's national currency at this stage, the price fluctuation of btc will make people think twice before spending their btc. A loaf of bread could cost 0.01btc today 0.003 tomorrow 0.08 another day and so on...
Different people have different preferences. Just like how some people prefer to use cash when dealing, some prefer debit card, some credit card and etc. Each method have their advantages and disadvantages, but people still use them. Same argument for bitcoins.
It goes to the miner. See the mining section to find out more. It is to those person who contribute their cpu/gpu computation to create those transaction blocks.