The nature of an affiliate network means that at any one time we are working with hundreds of merchants partners and sometimes through no fault of the network they will experience tracking problems. These problems can come from the merchant directly or through third party tracking companies (these are both evident in the example merchants you have named above) and as a network buy.at look to work with these parties to resolve these issues as quickly as possible.

buy.at does not have any widespread tracking issues.

I hope this gives a little more clarity on the situation

Regards

Chris Mockford
Head of Affiliate Development
buy.at