Coinbase is really active nowadays, I believe they want to be a real Binance competitor in the future, thats why they are adding a lot of coins and trying to create good relationships with Libar and TON for maybe a potential primary listing agreement.
That's really going to happen I remember the CEO of Binance giving negative comments about Libra Coin, so there's a possibility that they are not going to list Libra Coin and Coinbase is taking this opportunity by supporting Libra Coin, so expect cooperation between the two giants, it will be good for libra coin's entry.