User blog comment:Top Agent PGG jr./New challenge/@comment-24247028-20140426172042/@comment-24733878-20140427084614

The purpose of the fifth rule is to prevent players from cheating by going to a different mode to continuous three star streak. An example is Jelly Jungle. Level 295 is hard to earn three stars on mobile device but easy to earn three stars on Facebook. If this rule is not placed, players will play level 291 to level 294 on mobile device then play level 295 on Facebook to continue the three star streak on first successful attempt.

On a side note. My longest three streak could have been nine levels in Ice Cream Caves and Cookie Cabana. However, Levels 507, 508, 508, 510 and 514 were completed on Facebook and levels 511, 512, 513 and 515 were completed on mobile devices. DR levels 141 to 146 and 149 were completed on mobile device, DR levels 147 and 148 were completed on Facebook (DR level 147 at that time was nerfed on Facebook but not on mobile devices. Hence, my longest streak after Sour Salon is six (6) levels (DR levels 141 to 146).