not a primal dev or user my guess they added the code in but misconfigured the flags for when it should appear (not on reply function definately) It's a free thing, they add it, now web3 domain holders can 'connect with wallet' and use their publickey as their identity (I am guessing) not necessarily going full shitcoin, but welcoming users who want to connect via a web3 wallet... like a Google or Facebook OAuth