I don't necessarily know if this is relevant. Coinbase's custody business is a relatively small (but growing) branch mostly for institutions. Its consumer produ

I don't necessarily know if this is relevant. Coinbase's custody business is a relatively small (but growing) branch mostly for institutions. Its consumer product is not driven by the fact that it is custodial, but by its function as a gateway between the crypto and fiat world. Where you ultimately put the crypto you acquire through them is entirely up to you, and in fact Coinbase does provide a non-custodial wallet product called Coinbase Wallet.