Its strange that you are just adding Rainbet now, but like they say, its better late than never. I know your platform to be one of the reputable platform for casino reviews and I have also been using Rainbet for a while now and the experience have been great, so I was expecting you would have noticed them a long time ago and added them to your platform. I hope the review will make more people to start using Rainbet to enjoy the daily, weekly and monthly rake backs and other bonuses plus a seamless gambling experience.
3.8 is not bad, and the details presented are good, - there is always something to work with to become better in the long run.
I think user reviews on BTCGosu would add up to it nicely.