Why must you mail me such things?

Just yesterday, the B A Start household received an adver-mailing citing the following:

Sham-rock Solid Savings!

We have found it -- after years of diligent work, American society has hit upon the platonic ideal of lame marketing.

#1 - Shamrock needs no hyphen. It's a word.
#2 - That being stated, "shamrock solid" makes no sense, but "sham rock solid" implies falseness. This is the point in the brainstorming session where I would have recommended scrapping the idea. I feel for the poor Cassandra who presumably did so in my absence.
#3 - "Rock-solid savings" also makes little sense.

"How were the savings at the store?"
"Oh they were solid. Rock-solid, I say without hyperbole."
"Dear me, that is solid. Rather solid. Perhaps I should go to the store. As the savings are not fluid, I assume I will have a similar experience to yours."
"I should say so. Quite solid, really."

All in all, just shameful.