The largest retail coupon site in the country, and one of the largest traditional paper and printable coupon providers, are coming together under the same corporate umbrella which could help make coupons of all types even more accessible. Harland Clarke Holdings, the owner of RedPlum publisher Valassis, has announced its purchase of the coupon code site RetailMeNot. Fingers crossed this will be a win for all of us that clip coupons.