TYVM for sharing your detailed experience with us.
So today I have a total of 0.01353796 BTC = $243.2 comparing to $121.7 at that time when I opened my investment. My ROI in bitcoin is 10% but in USD is 100% thanks to the huge jump of BTC/USD pair.
First, 10% profit over six months isn't that bad considering that you don't have to spend any effort, it's just like storing our money in a bank account which makes you also get a portion from general profit.
Second, Yolodice is most known gambling platform which let users to invest within the platform and get a share from house profit. I know about their investment program since many years and didn't ever see a complaint about it. No one will run off with your money.
On Freebitcoin you can "only" earn 4.1% APY(but it's guaranteed) and it's one of the highest rate you can find on platforms.