@peculiarpots: The bots seem to check when a listing is created, renewed and / or edited. It is hard to speculate on why a particular listing was deactivated, but Etsy is cracking down on what they feel inappropriate. Copyright and trademark infringements is a large factor, but it also seems that the bots are looking for trigger words with no consideration for context. The classic example that may or may not apply to you, if you say an item is ivory colored the listing may get flagged because ivory is not allowed to be sold on Etsy. Since Etsy is now also factoring descriptions in search, they along with titles, tags, and materials (and possibly even alt tags if you are using them) are all probably being checked. And the bots are also "reading" images. Hopefully you have / will receive an eMail from Etsy explaining the reason.
Depending on what items are being deactivated you might want to search this forum for a more specific discussion.
