I think of myself as a fairly bright person but I need someone smarter than I am to help me with a question. Just got back from a 4 night stay in Vegas and spent the last two nights at the Mandalay Bay (Delano.) Got a decent offer through MLife with a small resort credit, mostly off a one night stay last fall at the Mirage. I know you earn 25 tier credits for your hotel stays and restaurants and such and that you earn 10 tier credits for every point you earn playing the machines. But I am confused at to how I went from about 7000 points to almost 37000 points in two days. The hotel would have accounted for about 7500 but there is no way I played enough to have earned almost 23000 points gambling. Did it have something to do with advancing to Pearl? After I did, my score jumped from around 1600 to 2200 when I inserted my card. I had a score of 500 or so when I started playing Friday night and I probably added between 200-300 more on Saturday. I don't know. I'm not complaining but it just seemed very odd that the score would have jumped so much. Thanks in advance for any of your wisdom.