Facebook Ads Interests

Hey!

I have question that maybe a lot of newbie wants to know!

Should narrow audience with engaged shoppers?

I made without engaged shoppers 1 sale, but I allow these ads just be active for 1 day, but with engaged shoppers made 3 sales, but it cost me a lot, CPC is high.
Is engaged shoppers is scam to FB make more money or it really works better than just interest alone?

Thanks for answers

Yes that's a good point, everyone says use engaged shoppers but I guess it comes at a price

How much more was the CPC

Test test test !!

Would love to know answer to this aswell