I joined MR 2.5 years ago. Have the Signature CC, but I only put Marriot stays/purchases on it. All the points came from stays and charging to the signature CC for those stays. Signature is great for racking up the MR points, it can't be beat.

# Membership Level: Platinum
# Point Balance: 735,605 points
# Total Membership Nights: 298

Nights this year:

You have stayed 135 nights this year. You need 0 more night to maintain Platinum level.

This doesn't include this weeks stay though (5 days). So actually 140, but ~40 of those are rollover... About another 60-80 nights to go yet this year.