Pretty sure they're referring to the number of hours you're allowed to bot a month, regardless of whether it's a free or premium bot.
Premium bot time comes off your wallet AND your time allowance. Free bot time only comes off your time allowance. You're given 200 hours a month, free OR premium, by default and are able to purchase additional hours beyond that, which is what the package description refers to.
Given that premium bots all have different hourly pricing, it's completely nonsensical to expect a fixed price package to cover a set number of premium hours.