The bonus of a timed reward...like you get free exploding candy at the beginning or wrapped candy etc...
It's set so you have a set amount of time for it, usually anywhere from half hour to 4 hours or more perhaps. Love the free bonus but can't always play the game for another half hour let alone 4 hours to capitalize on the gift.
I would like to suggest maybe having a way to perhaps turn your free bonus time on & off so you can use your free bonus time on your own terms according to you having the real personal physical time to use it. OR instead of a time frame you make your bonus available for the next however many games. Like what would be half hour of free bonus you get your next 2 to 4 games with that free bonus. Hours worth of free booster could equal 4 to 6 rounds with that starting booster & so on. I hope you see & understand what I'm trying to explain...I think it would be a great improvement/change to an already great game!