The Opening Service Gift was a feature in Plants vs. Zombies Online where the player got gifts consisting of plants, coins, and diamonds and other items up to fourteen days upon starting up the game for the very first time.
Missing a day did not restart the day counter, but would still continue recording, allowing the player to collect their missed gifts all at once. The plants collected here were only used for Adventure Mode.
Once all of the gifts from all fourteen days were collected, and the player logged in again after logging out, the feature would disappear, and instead replaced with the First Gift feature, which sold the latest featured plant along with a bunch of other rewards that could be all bought with real money.