Credit Card Incentive - Cross Sales

Employee at a credit_union ($147MUSA)
Hi all,

We're currently reviewing our cross-sale incentives, specifically on our credit card. I'm looking for some insight to see what others are doing to incentivize your front line to cross-sell credit cards.
Could you please share how your credit card incentive is set up?
How often do you pay the incentive, bi-weekly, monthly etc.
How much do you pay per approved application?