It's as if 'monthly service' is used as shorthand for 'monthly billed service', and 'annual service' is used as shorthand for 'annually billed service'. Is my problem that 'monthly' is used incorrectly in the first case?
It's as if 'monthly service' is used as shorthand for 'monthly billed service', and 'annual service' is used as shorthand for 'annually billed service'. Is my problem that 'monthly' is used incorrectly in the first case?