saw on you tube, dated May 20, 2021
I can't confirm, but its worth a try

If you fly into Las Vegas on any airlines, show your boarding pass within 24 hours of landing

at the players card desk at the D, Golden Gate, and El Cortez and get $25 match play (chips) and slot free play.

If you fly Southwest or Spirit, get $50 match play at the D

If you fly Allegis, get $50 match play at the Golden Gate

I've received different color chips from the D and GG for past play.
I don't know if the airline chips are different from the bounce back chips.
I think they're worth collecting, if you don't play them.