It pertains only to their in-house custodial lightning service. When you setup a default lightning wallet in the app it connects to their lndhub.io node, which they are shutting down. Anyone who runs their own lndhub instance or otherwise has BlueWallet connected to their own node is not affected. Also does not affect on chain wallets. Best thing to do is withdraw any sats to another wallet like wallet of Satoshi. Sucks that they haven’t given better instructions in the app. It would be nice if they’d push an app update that includes a splash screen or something with instructions on what users should do so they don’t lose those funds.