I thought this excerpt was interesting:
"The sale of small quantities of cannabis in coffeeshops is therefore technically an offence, but prosecution proceedings are only instituted if the operator or owner of the shop does not meet the criteria issued by the Prosecutor General:
no more than five grams per person may be sold in any one transaction and the coffeeshop is not allowed to keep more than 500 grams of cannabis in stock;
no hard drugs may be sold; drugs may not be advertised; the coffee shop must not cause any nuisance;
they are not allowed to sell alcoholic beverages; no drugs may be sold to minors (under the age of 18), nor may minors be admitted to the premises."
Could an implicated dealer use the legal defense that they were operating a coffee shop online? (Provided that they didn't sell > 5 grams of cannabis)
[1] http://www.emcdda.europa.eu//html.cfm//index5174EN.html?#
Also, it's also pretty much at the whim of the public prosecutor whether to close coffeeshops for not upholding the unrealistic 500 gram limit (for the amount of shops in densely populated areas other than Amsterdam).