this deal has been advertised on weekly shelf tags in some stores. according to a cvs email (image above), it continues until 2/6.
update 1/30: hershey products no longer appear to be part of this deal!
update 2/02: valentines m&m's are not counting towards this deal, but they do appear to have their own eb deal, get $2 eb wyb 2.
the following candy has been confirmed as part of this deal:
M&M's up to 12.8 oz (almond, milk chocolate, dark chocolate, peanut, & peanut butter)
- -$1 off 2 m&m bags blinkies at some stores
Snickers Minis 11.5 oz
Twix Minis 11.5 oz