The main target is to get a $50 bonus and he has got more than $50 if he continues the game there is no guarantee that he will end with profit instead he can lose
Unless we are free to play any game, maybe it can still be considered. If it's me, maybe I will do the same thing and waiting for other challenges tomorrow there is no need to rush to collect tickets we still have 2 weeks.
I have to say that he made the best decision, as he is not forcing himself to play while he is already in profit. The same as you, I'm sure I'll do the same thing in that situation unless it is getting really close to the wagering requirement for the reward, lets say few more dollars remaining to wager. Or because I do like to play the game without targeting for the reward. Anyway today's giftbox is nice, to bet $10 on world cup matches to get 30 free spins. Previous similar challenge, I won my bet and I got the reward but the 30 free spins gave me $3 only if I remember it correctly.