Heh, after thinking it over, this deal caused me to cancel my PS4/annual PS+ pass/KZ:SF launch day promo bundle with Amazon.
As everyone knows, that Amazon deal saves you $10 off the cost if the three items were sold separately. Since I already have a naked launch PS4 pre-ordered as well, I can now purchase KZ:SF digitally for $60 on that machine and I still have a year of PS+ for $32 with $20 left over in my PSN account.
On paper, the switch saves me another $8 ($18 total savings), but in reality I save even more money because I live in California where KZ:SF and the PS4 was taxed up the wazoo in the bundle... going digital saves me another $5.40 as a result for a total savings of $13.40 over the Amazon bundle, and $23.40 in savings overall off normal retail prices+tax. Not bad.