I'm using this 'clickhappier-archive' account to post archival copies of old MTurk-related userscripts from userscripts-mirror.org (which is itself an archive of the defunct site userscripts.org) and forum posts, which their authors or others haven't re-posted on Greasyfork yet. Some of these may no longer be all that interesting as more recent scripts may do what they do better, but some remain very useful.
This script was archived from http://userscripts-mirror.org/scripts/show/132559
Script Name: Mturk Discover Fake Availabilities
Last update May 5, 2012 — Installed 122,728 times.
Script Summary: Often times you open a hit to find there is no more hits available, even though MTurk reports that there is some left. This script discovers and lets you know
Note from Clickhappier: This script can be helpful, but it does make an extra page request for every single HIT you see on your MTurk search results pages.
For many more MTurk-related userscripts, see the Turking Scripts set.