I'll see you on the internet
A half-assed goodbye that means you're not going to actually say goodbye, but you're going to keep bugging them online.
'I'll see you on the internet', I'm not going anywhere, I'm just going to bug you online.
'I'll see you on the internet', I'm going to text you until you scream.
'I'll see you on the internet', I'm not going to stop talking to you.