On the Clz Comics Community somebody posted about this variant. You list X-Men #1I as a Club Bo variant. I did a little searching online and found out that it is in fact not even a variant. CGC had noted the Club Bo Insert on their notes, but back in 2022 they took it off because they found out that all the copies with cover #1A have the insert and it is not a variant. Here is a link to the posting about this on CGC’s posting board correcting this and saying there is no Club Bo Variant as all copies have this insert.
Hi, thank you for posting. Looked into this myself and seems like you are right. From my understanding this “insert” replaced the poster that was present in all the different editions. I have merged this entry with #1A. Thanks!