Roobet is just a new gambling site, and yes it launched in 2019 most probably they are already working on this site since 2016 to offer a great service a
The domain was registered in 2016 and then the person who registered it put it up for sale. It doesn't mean development of the roobet casino started on the very day the domain was registered.
This is probably where some review site confuse the years the casino was launched as they just look at the date the domain was registered.