"Oh, I like your shoes."
"DSW!"
"Cute dress"
"H&M $12!!"
And it's not restricted to clothing.
"Your new curtains look great."
"Thanks! JCPenney sale AND ebates cashback!"
"That looks good there."
"HomeGoods!"
I'd say it's a problem, but I actually like when other people do it, so maybe it's not a bad thing hahaha