Players have been using an exploit to gain free gems.
This has been on the down low until this week when the exploit has spread like wildfire.

Basically, they don't claim the Starting Sail reward envelope whenever they do Caribbean.
These all stack up. They claim them all on Saturdays.

One can get up to 250 free gems each week if you have the Jengu npc.
This doesn't count Saturday sails even.

I'm hoping this gets fixed soon.