VW has invested $2 billion in Electrify America [1].
With every manufacturer accelerating their EV rollouts, there will soon be more CCS EVSEs than superchargers. This move isn't about giving non-Teslas access to superchargers, it's about giving Teslas access to what very soon will be the majority of EVSEs.
It also about tax incentives: the government isn't going to support a proprietary standard.