Your mixing a business card and a flyer imho Simple contact detail business card Colourful flyer with all your pictures
Agree, what they are for is to put in packages for people to stick in their wallet to pass on to mates. Business card sized as more likely to pass on than an A5 flyer.
Go metal. That way people won't just bin them they'll carry it about to show off... Metal Business Cards — PlasmaDesign
These would be ideal if they were in copper instead of stainless steel. And shaped like a battery lead.
OriginExpand 1400-50; late Middle English exacten (v.) < Latinexāctus (past participle of exigere drive out, thrust out), equivalent to ex- ex-1 + ag(ere) to drive + -tuspast participle suffix