There's a similar self-denial of service you can run into when you're injecting javascript and cookies into third-party pages.
Optimizely (YC W10) had this problem when they were setting cookies on a single domain across all of their customer sites. If you happened to be the kind of user that visited websites that had a high chance of using Optimizely, you quickly accumulated enough cookie to make their fronting proxy reject your request for their JS.
Optimizely (YC W10) had this problem when they were setting cookies on a single domain across all of their customer sites. If you happened to be the kind of user that visited websites that had a high chance of using Optimizely, you quickly accumulated enough cookie to make their fronting proxy reject your request for their JS.