Shipping Restrictions Magento 2 Extension - Shipping Restrictions Magento 2 extension helps to restrict unnecessary shipping methods instead of blocking all of available shipping methods.
Tremendous - Tremendous is a customer and employee loyalty platform that allows companies to reward their customers for surveys promotions and referrals.
Payment restriction Magento 2 extension - Restrict payment of any product as per its availability.
Giftbit - Buy, send and track digital gift cards for your reward and incentive programs.
Mconnect Shipping Restrictions Extension - Shipping Restriction Extension for Magento 2 by Mconnect can set up numerous custom shipping restrictions and limitations based on the customer group, cart, and product attribute from the backend grid.
Rybbon - Send digital e-gift cards as marketing incentives or rewards with Rybbon, which integrates with Marketo, HubSpot, SurveyMonkey, and Qualtrics.