It's normal for people at FB/IG to not allow their children to use those apps. This is the same principle. TV ad execs probably have TiVo at home.

Favorite part and best part. When the large majority of advertisers block advertisements there's really no room to complain when anyone else does the same.

Could make sense if they're trying to see what methods make it past blockers. I probably would do that if I were in that industry.