FreeBitco.in has enabled a new feature. You can now earn interest on satoshis left in your account. All you have to do is maintain a balance of at least 30,000 satoshi (0.0003 BTC) in your FreeBitco.in account and you will be credited 4.08% annual interest. This will be paid daily at a rate of 0.0109589% per day and rounded down to the nearest satoshi.
Now not only can you earn bitcoin from filling out Captcha challenges, engaging in lotteries and from referring others, you will also be earning 4.08% interest on your account!