I recently had an issue booking an M Life offer that was sent to my linked player (sometimes I get them, sometimes they get them, there's no telling who will get them). This is the 3rd time it's happened, first Monte Carlo, then Luxor told me only the player who received the offer can book it, so the only way the linked player can use it is if they are travelling with the player who got the offer. I reached out to M Life via social media and they confirmed: "This is something new at a select few of our properties." In the last 10 years, my linked player and I have always been able to share offers, and travel without each other using them. We like this because we don't always travel together, and it lets us keep our tier status and coming back more often between the two of us. Just a heads up... so far Monte and Luxor were the two I've experienced that gave issues at check in. NYNY gave some issue at booking but ended up approving using the offer after some discussion. I haven't had any issue at Mirage or MGM so far.