Thank you so much, this is exactly what I was looking for.

Are there any other services similar to this or is it only coinjoin, its more for institutional investment needs rather than rerouting of funds.

The underlying reasoning behind is irrelevant, but if I were to transfer btc from one wallet to another wallet but wanted a third party to pay the transfer fee how would I go about this?

Is there some sort of wallet insert I can use?

Are there other cryptocurrencies that facilitate requests like this or?