Ever heard of Bitcoin Faucet?
Bitcoin faucets are a reward system that dispenses small amounts of free BTC to visitors in exchange for completing a captcha or task as described by the website. Generally the rewards are given out periodically. The reward is paid in satoshis and may not be significant, but its Free!!!!
Its definitely no way to make a fortune but you could probably accumulate enough to purchase some Steem Power :)
Here is a good list of available Bitcoin Faucets that you can use :
https://en.bitcoin.it/wiki/List_of_faucets