The most common way to snag a freebie today is through a park pairing. Rather than two tickets to the same park, these offers often give you a second park for free.
Purchasing a Busch Gardens Fun Card often includes an Adventure Island Fun Card for free. This grants unlimited access to both the theme park and the water park for the remainder of the calendar year. busch gardens buy one get one free
Periodically, the parks release a true buy-one-get-one offer on single-day tickets. These are almost always "Flash Sales" that last only a few days and require visiting by a specific date. The most common way to snag a freebie