The difference may be statistically insignificant—but the difference is still there. The odds are 500 times greater than if you bought just one ticket.
Nope.
Its not my one ticket against your 500.
Its my one ticket against 175,000,000, and your 500 against 175,000,000.
Again, statistically insignificant.
But, hey, its a semi-free country, do what you like...