Reports that there is an extension of the deadline to download groups until Jan. 31 are a smokescreen put up by Verizon. The Dec. 14 deadline still holds, but they will take requests of users for their data until Jan 31. This is a fail because:
From Yahoo's reply to the modsandmembers group: "The Groups Download Manager will download any content an individual posted to Yahoo Groups. However, it will not download attachments and photos uploaded to the Group by other members. For those that are having difficulty with the files delivered, this help article explains the types of files within the .zip file sent ... "
The point made on IRC:
The important point is they won't give you the vast majority of photos and attachments. They also don't export databases at all, which are important for certain groups. It's completely arbitrary too, because they give you files other people posted...
Apparently now that they have gotten through the Fandom groups, and are working through the groups that were requested to be archived, they are ranked in order of number of members. So they are working on progressively smaller groups.
I got into this tangentially because of a community and ecosystem of Y-groups that I've been involved in. When I found the Archive Team's efforts, I hitched my wagon - though I'm not at all central to that group.
Yes, exactly. Other groups have medical tests uploaded to the files section, to be shared with other members and discussed on-list. And yet others had artistic works or literature.