All in all, I would say that freebitco.in has been around for a quite long time, it was a website that barely got any visitors back in the day when it first started and I was here when that happened. In the end, they did manage the website well enough that it is one of the most visited websites in the world now.
They can modify the rewards from the free rolls if abuse is the main culprit behind losses from the site. This is assuming that the casino is actually losing more than winning which is highly unlikely, even though certain people might be using the event as an excuse to promote their own koolaid and social media.
The site is trusted but I would like a higher responsive support system. Maybe something similar to what competing casinos are having? Would that be too much to ask, consider the UI is much simpler on their site than others?