I can't provide a source for him but if you look at the new features that 3 years we did not have, world transfer 30$, premium scrolls can be sold ingame so is like buying tibia gold but 100%safe, gifts when buying long premiums at certain time (mounts) they might have lost players but they found other ways to make money and am sure they will find more ways
so with less player cipsoft probably is making same money as when tibia was in its peak