Problem is the GMs here are scared sheetless of pissing off its players by deleting any OP gear - no matter how it came to be here.
Pretty much all of those players provide $$$ to the playwith wallet and they don't want them to end up rage-quitting. That's why there are still Epic and Upgrade weapons in Jainus and why they caved in had cheap upgrade sales (don't get me started how they frakked over those that paid well over $200 for the original ones) for a few months when it was time to merge in the servers without them.
They don't care that there is game-breaking gear in these servers as long as the $$$ keep rolling in. Welcome to Pay2Win. It has always been this way, it is this way, and it will continue to be this way.
Yolo looks pretty damn good now (some folks will know what I mean there).