$3.30 per sheet, but assuming you get 1000 uses that's $0.0033 per use.

Staples has InkJet paper online for $8.79 (500 sheets per ream). That's $0.0156 per use (single sided print).

If my assumptions are correct, that sounds cost effective to me.

I'd be more worried about the paper getting damaged before you can get all 1000 prints out of it. I'd hope the paper is sturdy.

'Must' be? The captioning said it can be bought by the thousands.