Post-transaction cross-marketing consultation and research

Attention: it is not expected that you will be needed to post listings on other websites or undertake any such activities or spend money in any form. Solely remote consultation is required based on your work or personal experience.

Post-transaction cross-marketing: after paying for goods or services (online \ offline in chain retailers), the consumer is offered a voucher or digital promo code for a discount \ free month in online cinema \ free use of a credit card, etc.

Other examples:

Showcase of offers - after an online purchase, "you have a gift" is displayed, then a wall of offers (or wheel of fortune) with promo codes
Scratch cards when buying in a supermarket (big chains, preferabbly 10K+ points of sales, if none - 1K+) with (or without) a loyalty card with the opportunity to win prizes from partners, including a guaranteed prize

Consultation on this market abroad is needed - Latin America, Turkey, Southeast Asia - priority; first world countries - second priority

What I would like to know: market sizes, key (global and local) players, key mechanics used, trends, expected changes, pitfalls, case studies

What is not expected:
digital: NOT post-transactional stories (like Groupon, Cuponstar, Biglion, etc.)
printed: local stories (like coupon for free coffee in nearby coffee-shop, when bying 10$+ in local grocery store);