What percentage of buyers of our vectors use them for resale items like t-shirt?

Hi everyone,

I am just wondering how many buyers of our vectors with RF standard license uses them for resale, unlimited print run (like t-shirts), like if they bought Extended License?

I mean can anyone ever control all those small print shops all over the world who can download our vectors for several cents by subscription and use them with violation of Standard Royalty Free License? I'm afraid no one can stop them to do such things. Recently I browsed site of some print shop in Birmingham, UK with lots of my images and I am not sure if they bought Extended License which is obviously not cheap.

Does anybody else has the same concerns?

I'm actually really curious about this too.

I am afraid that plenty of buyers are doing such things. I strongly believe that it should be option for contributors to choose to sell their images ONLY for Extended (or Enhanced) License for higher price, not for just Royalty Free PLUS Extended (or Enhanced) License.