CityBuildTrade was listed by ISA, so this is not a purchased listing. I played CBT in 2015 and 2016 when the ROI was 105% after 7 days. This is just 102% at the moment (better than nothing), but I guess CBT still deserves attantion. Of course I recommend to pay with not larger amount than 100$ - just for fun.
Update: long term investment plans were introduced. We were able to earn 2% after 7 days till now, but from now 30 days are required for the same ROI (17/Oct/2021)