Brian Carl is a profile-maker/seller and I don’t believe he’s knowingly shared any on the Rig Exchange.
He does have a free pack and *maybe* those particular ones are from it but I don’t know that for sure.
He puts his free samples on the Rig Exchange unlike most of the other vendors. His stuff is my favorite I think. I have bought 5 or 6 packs from him but my favorites are the Deluxe + free one and another Morgan free one he sent out to people on his mailing list.