(IAAL but this is not legal advice. Consult a licensed attorney in your jurisdiction if you need legal advice.) This is interesting. GitHub has an Actions mark

(IAAL but this is not legal advice. Consult a licensed attorney in your jurisdiction if you need legal advice.) This is interesting. GitHub has an Actions marketplace but it doesn't seem to be namespaced like the rest of GH is. This sets up a potential for a naming conflict where first-to-register wins, much like Internet domain name capture in the early days before registrations could be challenged by trademark holders. For the time being, it looks like developers should come up with creative names for their Marketplace add-ons to help avoid conflicts. With sufficient creativity, these may be subject to trademark protection; and creators might be able to leverage laws including DMCA to prevent such squatting. OTOH, "label-actions" is pretty generic and IMO it was only a matter of time before someone registered it in the Marketplace -- if not by Facebook, then by someone else.