If I remember correctly, in Vegas, VP earns one point per $10 coin-in, and 1 point earns 10 tier credits. This works out to $1 coin-in = 1 TC. If these numbers are right, at Borgata, it takes $6.67 coin-in to earn 1 TC. That seems awfully stingy.
Compare Mlife Gold for $500k coin-in at Borgata versus $50k for Total Rewards Diamond (with daily tier credit bonus, or even $150k without bonuses). I've never been to Atlantic City, but does Borgata really rate that much of a premium? Someone fill me in on what I'm missing!