To clarify, no Karmashares-related products or services are for sale or have been sold.
The Karma and Karmacoin logos are technically owned by myself (as I started the contest and paid for it). Not that it makes much difference, but I was the one who pushed for the name change to "Karma", although of course quite a few of us will always know us as Karmacoin
Karma and Karmacoin trademarks, in the digital currency classification, are technically owned by myself (as I registered it and paid for it). The idea is to provide exclusive use of these names to the Karma cryptocurrency community (and protection against any other parties wishing to use these names). I do not see myself as the owner but caretaker of these marks.
Karma is open source. No one owns the Karma source code.
Karmacoin.me is a domain that I registered (as are KarmaFund.me and others)
kosmost you may have organised the contest and may have paid the lion share of the reward but the contest was actually for an open source logo which was incorporated into open source software.
so you are the benefactor not rights holder.
as I said it doesn't matter if you registered a Karma trade mark or not there is enough prior art and documentation to prove that it was done for, and given to an open source project and as you so rightly put it you even see yourself as the caretaker not the owner.
Do what you want with Karmashares but don't try to sell or buy Karma rights because you wont get far trying to enforce those rights on an open source community.