People like to compete: seeing the same questions makes the scores comparable. Having common context of the same "daily pics" also creates opportunities for discussion & debate which don't exist otherwise.
Trickling out synchronized games may create more durable entertainment, because otherwise many tend to play intensely until they bore of it, considering it "done" – never checking back.
Returning back each day may generate more 'fun' per game, as the satiation of repeated play is minimized. It also cultivates a reliable audience for incremental changes/experiments that take time to implement & evaluate – assiting iterative improvement.
Trickling out synchronized games may create more durable entertainment, because otherwise many tend to play intensely until they bore of it, considering it "done" – never checking back.
Returning back each day may generate more 'fun' per game, as the satiation of repeated play is minimized. It also cultivates a reliable audience for incremental changes/experiments that take time to implement & evaluate – assiting iterative improvement.