Sis Perks

How do I sign up?
How do I start earning points after joining?
How do I check my points?
Do my points expire?
Can I have multiple accounts or transfer points to another account?
How do I use points?
I placed an order; how long will it take for my points to be applied?
Are there limitations on earning points?
How do the coupon codes work?
Can I combine discounts?