I just placed an order at Dominos for delivery from my pc. After I submitted the order I received a popup for a free 2 medium pizza valid the following week. At first I thought I would have to do a survey or something so I was a skeptical but no strings. Just have to have a minimum order for delivery I guess.
I put YMMV because I have no idea if it will popup for you. Just wanted to share the possibility,
Order placed March 14, 2020.
Can also combine with $30 for $25 e-gift card in other post
As shopper99 pointed out this may have been because it was 3.14 aka Pi Day