If you're looking for an exchange with low transaction fees that also pays a referral bonus you should get signed up to buy and sell ROI coin at BitexLIVE.com. They are based in Turkey and have provided us with excellent service.
BitCoinTalk is the most popular online forum for all types of cryptocurrency. Our community is very active there and it's a great resource to stay in touch with the people who are involved with ROI coin.
GitHub should always be your first go to resource when you need any type of support. You can submit issues there and interact with the dev team. You can also follow the active development of the ROI coin code.
The paper wallet is a useful tool that allows you to export and import coins and print them for safekeeping. Because ROI coin pays full POS and term deposits when your wallet is offline you can be very creative with this option.