PSA will give you higher grades on more expensive submission levels so you keep paying higher prices.
PSA will give you higher grades on less expensive submission levels so they can upcharge you.
PSA will give you higher grades on all submission levels so you are satisfied and keep submitting cards to them.
PSA will give you lower grades on all service levels to avoid financial guarantee payouts.
PSA will give you lower grades on higher service levels because those more valuable cards will be particularly scrutinized and reflect badly on PSA if they are misgrades.
PSA will give you lower grades on higher service levels because those graders are better trained at catching damage.
PSA will give you lower grades on less expensive service levels because that’s where they employ computerized, automated dent detection to cut down on grader time per card.
I think that’s all the conspiracies?? I probably forgot a few.