'No tricks, just treats' as a subject line?

No.

No imagination.

No information. Nothing to pique my interest as I scan the subject lines in my email client. Plus they hid the lede in the body of the email: 25% off sitewide. Get that in the subject line! Like ... Proflowers: 25% Off Everything for Halloween! One more thing: What the hell is a jump scare and what does it have to do with selling flowers?