I don’t see where it says how long that extended trial period is… but either way, the phrase “trial period” indicates it is temporary and will require a charge at the end of that period.
Getting an extended trial period of previous functionality is not the same as being “grandfathered in” to that functionality. It could be called an allowance or extension or benefit provided in consideration, but trying to make the case that a temporary extension is the same as being “grandfathered in” at the very least would be, again, disingenuous.
