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.
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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.