That would just promote afk and not relatively constant activity that the game wanted.

I mean... why do you think the game doesn't just give you 20 free refresh and be done with it? They want you to be actually online, in the game.

I mean why even have a survival trial? A strong approach? A richfield? Why not just s*feed the rewards to the players? An arbitrary requirement or challenge in order to receive reward is the fundamental building block of games.