Exactly... How can you sell something when you have no idea what your selling, and in my opinion, you must know your product before you consider selling... as you stated, it could just be a colony of workers.
Or worse, it could be invasive pest ants like RIFA or Argentines. Actually they might not even be ants but termites (you wouldn't believe how many people confuse those two).
Does nobody actually look into what they're saying? I sell regularly via GAN, so i know what I'm talking about. They've yet to inform us or add any additional charges, so you're wrong.
This makes it pretty pointless for Europe where you can just buy ants from an online shop in UK, Germany, Spain or whatever - and yes, even exotic ones.
Which is sad because Europe is the place that would actually need something like this to encourage the appreciation of native or at least european species.