I just saw this contest; it started back in May.
Below is what was in the Mtn Dew email newsletter.
Some of the fine print:
Contest begins May 7th, 2017 at 12:00:00 p.m. Eastern Standard Time (“EST”) and ends September 30th, 2017 at 11:59:59 p.m. EST (the “Contest Period”).
During the Contest Period, entrants are required to take a photo of themselves “Doing the DEW® – with a DEW®” and post their photo and the hashtag #DEWWalmartContest via Twitter or Instagram as defined below (an “Entry”)
Contest open only to legal U.S. residents residing in one (1) of the following states Oregon, Utah, Arizona, New Mexico, Texas, Colorado, Wyoming, Montana, Hawaii, Washington, Alaska; who are 18 years of age or older at the time of entry. Winner may be required to show proof of residency and or age.
Judging Criteria: Participants will be judged on the following criteria at the Sponsor’s discretion: 50%: Creativity/Originality, 35%: Relevance to Theme and 15%: Quality of Submission/Photographic
Grand Prize: 2017 Jeep Wrangler Details and 21 weekly prizes: Altec Portable Bluetooth Speakers
The website : https://www.howdewisdone.com/walmart/