From the BConnected website:
"Getting To The Points
Here's how you'll earn your points:
$1 Coin-in Slots = 1 point and your Card Score* increases by 2
$1 Coin-in Video Poker = 1 point and your Card Score* increases by 1
1,000 slot points = $1 of FastPlay** downloaded to your favorite machine or $1 cashback**.
*Card Score has no cash value.
** 5,000 slot point minimum to activate FastPlay and redeem cashback. FastPlay available at The Orleans, Gold Coast, Suncoast, and Sam's Town.
For Table Games your Card Score will increase based on your length of play, average bet and type of game."
In short -- the "card score" is what determines your tier level. Slot points are for comps and cashback. So, in answer to your question, multiplier points are SLOT points and do not contribute to your card score/tier level. They are shown in your account as totally separate numbers.