NSA XKeyscore Tool ‘Could Crack VPNs And Expose The Anonymous'

I had also noticed this and commented on it in another HN discussion: https://news.ycombinator.com/item?id=6145932

   "Show me all the VPN startups in country X, and give me
    the data so I can decrypt and discover users."

Can someone explain this bit to me please? I read this as:

  1) The NSA have a list of companies (grouped by country),
     which analysts can 'target' for further inspection.

  2) The NSA can 'decrypt' that encrypted data.

  3) The NSA can 'discover' users.

2) and 3) are weird and scary. This suggests that VPN traffic is not secure at all. It also suggests that they can target specific users exiting at that VPN provider. There is nothing stated about restrictions on particular VPN protocols, suggesting that all are decryptable. Hence, OpenVPN could be also as vulnerable as PPTP and L2TP/IPSEC.

To me this suggests that VPN's provide no privacy value against NSA spying.

How have other people interpreted this slide?

@thepackrat comments suggested that:

   "By VPN startups, they mean initiation of a VPN session. 
   Specifically, this means they can grab the credentials 
   at the beginning of a PPTP VPN session, and then decrypt
   it. PPTP has been known to be vulnerable to this sort of
   attack for some time."

(https://news.ycombinator.com/item?id=6148869)

It still isn't clear which types on VPN are vulnerable and which are safe. Based on the fact that the slides didn't specify VPN protocols that we all know are vulnerable (i.e. PPTP), one has to assume that they all possibly are.

Here is another possibility:

   - The NSA might just have 'catch all' filters where 
     VPN's exit.

   - Using the data from this you could match up traffic 
     which leak the user's identity.

   - Hence, I use a VPN that exits in London. I have 
     specific browser signatures that can help to isolate 
     my traffic.

   - I visit Facebook using that VPN. That action has now
     leaked my identity. I now start searching for how to
     make a pressure cooker bomb. Bam, you're on the    
     'potential terrorist' list and identified via your
     matched traffic.