Dinosaur Protection Site which is kinda like some damn fandom site for nerds. Says Sorna was abandoned because of regulations not being upheld by the Costa Rican government. Apparently people started going hunting, that's when around up to 2005 when JW opened they were rescuing the Sorna animals to Nublar.
However being that the island was Restricted, how the hell Ingen was alive after sanctions for the San Diego incident still baffles me..
Even a UN intervention was never thought of with the events of JPIII.
Also I'd like to add being that 200 Ingen Marlboro men got their *** kicked in 1997 how the hell did Sorna become vacant... I mean especially with 2 subspecies Raptors on the Island...
Because JW is a soft reboot. They don't have to explain ****.