How to determine if a user is using captcha or from adblock?

Question

Internet advertising

Spotify bans users for ad blocking, how are they determined and what known techniques are reliable enough to ban a user?

Answer 1

One option is to use a URL script that is blocked by most filters, such as containing /ad/ in the path. In this script, set a variable, and in another script, check if the variable has not been set for a certain time - it means that the ad blocker is enabled.

Answer 2

the scripts are all on the client - pick them up, they also give all sorts of teasers, but there may be malicious ones

Answer 3

adblock wraps hidden content incl. search by class