In addition to the tag= parameter, certain affiliates also use an ascsubtag= parameter, ostensibly for more detailed tracking. I'm not sure if it would still work when it doesn't accompany a tag=, but I assume that since it appears to be a partner derived ID they would be able to link it back to the visitor. Tracking, regardless.
In addition to the tag= parameter, certain affiliates also use an ascsubtag= parameter, ostensibly for more detailed tracking. I'm not sure if it would still work when it doesn't accompany a tag=, but I assume that since it appears to be a partner derived ID they would be able to link it back to the visitor. Tracking, regardless.
See here for some details: https://www.quora.com/How-do-companies-use-ascsubtag-in-Amazon
Use any of the zillions of affiliate links at thewirecutter.com to see this tag in use.