I'd guess 'under FISA coverage' means they're collecting all traffic, but can only access it with FISA court approval (i.e it's under the coverage of the FISA c

I'd guess 'under FISA coverage' means they're collecting all traffic, but can only access it with FISA court approval (i.e it's under the coverage of the FISA court). Traffic outside the US is collected, but probably doesn't need any approval to look at. I'd suspect that all your visitors are in XKEYSCORE.