How do coupon sites get the coupons to put on their sites and how do they monitor to add new and delete old coupons?

There are a number of different ways coupon sites source and monitor coupon content, and each site is different. However, there are some methods that are common to most of the sites. Common methods Affiliate network datafeeds. Store partner datafeeds. Affiliate partnership email updates. Coupon and deal aggregators like ForMeToCoupon. Less common methods Users suggestions / submissions. Store promotional emails. Crawling / Scraping the web with automated tools. Of these, we at https://www.couponchief.com believe user submitted coupons to be the strongest source. In fact, we pay our users to submit content as part of a program called Pays-2-Share. This is our largest source of coupons, and ensures we are the first to know about a new promo code since our site is largely crowdsourced.As far as monitoring coupon expiration, that is typically done with a custom CMS that will remove coupons from a site once the expiration is reached. Sometimes expired coupons will in rare cases actually still work, which is why many coupon sites will leave expired coupons available to end users.

We are a development group out of Miami who recently launched a free Google Chrome extension in beta, CouponMate. In terms of backend end technology, we act as a “meta crawler” for coupon codes using a variety of methodologies, from natural language processing and machine learning to optical character recognition.  Every minute of the day, we’re actively crawling retailer’s sites, parsing their emails, SMS blasts, and social feeds while simultaneously monitoring other media outlets to source the latest and greatest codes.   We update our database every 20 minutes for ~100,000 retailers currently.  Download @ https://www.couponmate.com/?ref=Quora One of the benefits of the browser extension technology is we’re able to create a direct feedback loop for the sites enabled for full automation.  The moment we see a code applied that comes back “invalid”, “expired”, or a similar explicit failure — we remove it from our database.

Coupon sites get their coupons from the retailers directly.  The larger sites get exclusive codes and vanity coupons.  Coupon sites are affiliate marketers and many retailers make generic coupons available to all their "publishers" through this channel.    Most top coupon sites feature active coupons that typically work as stated.  In full disclosure I operate a coupon site and also an employee discount program.http://retailcodes.com/https://corporateshopping.com

The coupon websites like http://www.lootainment.in gets their coupon directly from ecommerce stores and other affiliate partner programs. The coupons provided have a start and end date, monitoring of these coupons are done on regular intervals and nowadays various tools or plugins are available which keeps indicating regarding the coupons about to expire.Similarly various tools for updating the sites with new coupons are available. Please visit http://www.lootainment.into see the coupons updation and their expiry dates as well.