Correct. They are likely assuming that most of their applicants already have Priority Pass from another source, and this could be a ploy to push the cost of the benefit to the other card issuer. It remains to be seen if they will actually bill for visits beyond four.
i wonder what the data is on usage of Priority Pass memberships, i have it through the amex plat but use it once a year if that, and alot of CSR holder's in my office hardly ever use it. They might have looked at the data and capped the freebies at 4 out of that analysis.