I'm not saying that. Only that the ones I have mostly came with Dragons. I know that because I have conspecti that don't correspond to any boxed games I own.
My suspicion is that they put them in almost everything. Randomly. If a product was released in a month they were making Conspectuses, it may have gotten one. I don't know.
That is - some boxes, but not all boxes, may have gotten a Conspectus. As it happens - of the five or six boxed sets I bought back in the day, some are 'intact'. They still contain everything that came with it and were never used. And they do not contain a Conspectus. Others were unpacked and no longer include advertising materials. They may have included a Conspectus.
I think this falls in the category of obscure research. Did TSR product X include a Conspectus or not. Are their different 'printings', some of which included it or not? Etc.
I'm just sceptical of whether there is going to be sufficient interest to track down the data.
For my part:
My copies of The Dark Sun boxed set (TSR 2400) and Al Qadim A dozen and One Adventures (TSR 9432) do not appear to contain a Conspectus, although they are fully complete in all other ways (containing catalogues, subscription flyers, response cards, etc). My copy of Al Qadim Golden Voyages (TSR 9366 - already sold) - ditto. My copies of Cities of Mystery (TSR 9262) and Road to Urik (TSR 2406) do not contain a Conspectus, but all other advertising materials have been removed so I don't know if they ever did contain one.
The Dragon #232 - Dragonlance Conspectus
The Dragon #226 - Birthright Conspectus
Which other issues had Conspecti, I don't yet know. If anyone can point to specific issues and match them to the appropriate Conspectus I would appreciate it.
But I don't know that no boxed products had them. I just don't think that any of my Conspecti came from boxed games (although I cannot prove that).
edit:
RPG United says (of the
FR Conspectus):
"This conspectus was included in various TSR products throughout 1996 to promote the campaign."
So I again conclude it depends on the year of publication of the Boxed game and the relevant Conspectus. (And thus my own boxed games may simply pre-date the release of the Conspecti).
FWIW: RPG United gives 1995 as the publication date for the Dark Sun and Birthright Conspecti and 1996 as the publication date for the Forgotten Realms, Planescape and Dragonlance conspecti.
Carl