The denial of release of my first extension
And:
Off-site linking:
Video-overlay extensions may not contain links of any kind.
Panel extensions must submit a whitelist of domains requested for off-site linking.
Off-site links must be related to the extension’s core functionality.
Off-site links may not refer users to sites that deliver functionality effectively similar to that available on Twitch.tv.
And yes, the link in “My first extension” was related to the core functionality, but most links incentive leaving Twitch, so Twitch hammers it.
The rules are slightly vague, but “my first extension” was blocked from release due to a link to the Channel Currency store.
And I don’t think linking to a casters Twitter page counts as “core functionality”