it'd be more customary to list the sale venue by the name of the registry itself responsible for the extension and not by the name of the registrar through which an actual sale (which is equal to a new registration of a premium or reserved name) would take place.
Certainly some registries do regularly list them under their name, such as the .global ones. It seems a mix with .club I think. They certainly released some of the big sales like wine.club at $140,000 as a
Club Registry sale, and in other cases the venue is listed as
Direct Registry Sale for startup club at $22,500 and a number of others. Since Namecheap sales are not automatically on NameBio, it would be reported according to the name supplied when the buyer or seller provided documentation of the sale. As far as I know Namecheap never individually report. I sort of agree with your point if the registry did report, wouldn't they take the credit. Anyway, acknowledge that it is not clearly a registry sale, although I think it is possibly one.
As is widely known, it should noy be possible to acquire domain names directly from the registry itself.
Not sure if you meant they
should not be allowed to do this or that
they are not. Under the new gTLD program registries are allowed to sell premiums directly, and some have a branch just for that, although of course they must get registered at a registrar as part of the transaction. With legacy, Verisign has sought the right to be both registrar and registry for .com, but has not been granted that.
Interestingly, healthcare.club is now operational (sort of) and it appears to be going to be a blog. Will be interesting to see who the author will be, as this is a premium price for a blog name.
Bob