Artisans have put their mark to their handy work since .... well since man learned to 'make their mark'.
Midlevel days I have heard black smiths put their mark to armor.
To have a maker's mark proves the item's authenticity, and as mentioned avoids 'fakes'. In my own opinion it also helps me remember who made it when I take to showing it off or simply if someone asks.
On that note however, I would not like a fine piece that was so marked as to where; if in camp or on a firing range someone might be admiring something I have and walk up to me and say "How are you doing Two Feathers?", or have someone who don't know me see it and think "he must have stolen that from Two Feathers!".
Sorry I dont own any of your work (hopefully one day) so I don't personally know your 'mark'. But I do have a, for example, a throwing knife and hawk; i know who made it and even if i forget I can show people his 'mark' if ever asked "Fine piece, where did you get it?"
On the other hand, I have a very well made Slim Jim holster (sorry, blasphemy please forgive), and the maker carved (in leather) his company name rather large and very noticeable. In my own opinion that made it look very commercial. But as I dont have the supplies or tools for something that well made (and other modern makers are doing it too), I paid for it then rubbed and worked it out - nothing like going to a gun fight with a Levi's Logo prominently shown 'in your face' on your main piece.
But with that said, I would say to All artisans; Make your mark, be Proud!!
(and yes, I have and do make 'stuff', and I know the feeling when you find someone passing off Your work as their own....I will shut up now as that is a sore spot for me...)
Power to you Two Feathers, be Proud of your work. If someone 'needs' your work without your mark, offer commission work...maybe he/she has a legit reason.