If you guys could go ahead and restrict the use MBs while being on another world

[Hash_Browns]

No thanks I prefer being about to buy items on other servers MB when mine either doesn't have any, or has 1 to 2 for 1,000s more.

Take the chocobo leveling onion. It used to sell for 100-150k or so when i left the game. Now it is well over 600k (it was 1 mil when I got back right after Shb release but has gone down and then back up to ~800k). The only reason for this price difference would be the MBs are now linked.

No. This price difference happened because of ShB. People want to level their chocobos again. Demand outweighed the small supply. Also, BLU.

Onions take 10 days to grow each, and the seeds are just as expensive as the onions. Meaning the only way people are going to grow them is to cross-breed with +60k seeds themselves. So 15 days, and constantly watching a garden, as well as owning a house.

This isn't because of the MB update. It's because people want the item. If the MB wasn't cross-server, they would have easily reached over 1mil gil.