I did a search of our boy Gary’s posts @garyis2000 in his thread about grade results and grading specials searching for certain keywords. Hits a bunch of them and trims down the original 123 page thread a bit. You can probably find ones I missed clicking through page by page in that thread.
Search results showing some monthly specials
There is no rhyme or reason to the specials really. Your guess would be as good as anybody’s. Know that they are very backed up and though it wouldn’t be intelligent to offer a great special, they have done it in the past and may do it again.