What do you mean? It will stay open for you to withdraw the existing sats but you can't add any more to it. The existing wallet limit basically goes from 100k to 0.

Satosora

SN elects to go noncustodial on Nov. 5th - FAQ & AMA

k00b

> So if I have sats on here, I can still zap sats, without an external wallet?

No, not after Nov 5th. All sats for payments must come from your own wallet after that date.

> Or the sats will just sit until I withdraw?

Yes 

> And you cant withdraw cowboy credits, right?

Yes, no withdrawals of cowboy credits.