Don't try to think about it too much other than 'It's magical internet money' that can also let you buy into other 'magical internet money' such as Bitcoin, Ethereum, Dash, Litecoin etc if you don't want to keep it all as STEEM/SBD SP (diversify your portfiolio). For now be happy you are noticed by people, or bots, or whatever is upvoting. Enjoy.