Referral/sending gift card vendors that integrate with Marketo

Hello Community,

My team would like to begin a customer referral program where we send giftcards upon them submitting a referral to us via a Marketo form. My question is if anyone has used a vendor that integrates with Marketo that will allow the customer lead to flow through a smart campaign triggered by the referral form fillout and the flow could be to call a webhook that will send a giftcard to the address on their lead record.

Any suggestions would be much appreciated!

Thanks,

Devraj