There are many platforms in the Fediverse. The fact that the network can survive the collapse of one platform is a strength of decentralization. The Lemmy/mbin/piefed universe can only ever be exactly as big as we, the users, want it to be.
Kevin Rose and Alexis Ohanian own Digg now. Alexis Ohanian never worked at Digg and Kevin Rose was replaced as CEO by the board in 2010 for non-involvement. It's still going to be a non-federated for profit platform. But there's no reason to think they would ruin Pocket or even change it dramatically.
It's also an avenue for attacks.