User blog comment:Semi-Squishy 3000/How to Bypass Crashing on iOS/@comment-63.227.176.188-20150724150745/@comment-180.214.232.22-20150724155842

Everyone is concerned about login streak because:

1. Login streak gives you chance to get free gem each day by selecting the right chest, and the gem only provided by the chest as long as you have full rarity bar, which is you must keep your streak.

2. Hundreds of login streak is required for claiming thousands of merit points. (100 day, 200 day, 300 day and so on).

3. Shortly, everybody loves bonuses, and login streak provides them.