...their own Grand Company will earn greater rewards.

Can we please have specifics on this? This has the potential to cause a lot of problems for existing link shells whose members join different Grand Companies. For instance, I'm insistent on joining The Maelstrom, many others considering Order of the Twin Adder, and I'm sure there will be some black sheep in The Immortal Flame. Are we talking extra gil, or increased Grand Company currency? If so, no biggie. Unique/increased drop rate on equipment? That could cause a problem.