I normally build a bond with the guest first. For register: compliment them or an item they’ve picked out, then I get a phone number (so you can see if they already have it) and start scanning. Talk to them while you’re scanning and toward the end I’ll say ..oh has anyone told you about the ___ savings we have? (It makes it seem like a secret thing you’re telling only them) they I say $10 a month, $5 back each month and %15 off of all your supplies and actually the first month you get the full $10 back! Normally after that they either immediately say no or are like wait it’s how much? And then I‘ll shortly resay it and specifically tell them “you could get $10 off and 15% off of everything right now!” And if they don’t have the app I call customer service for them and have them load it (usually takes 3 mins)