when you wear a set(like christmas equips) you get a level 1 bonus where everytime you claim a reward from the reward bar it'll give an +30 coins(theres also lvl 2(40) and 3(?) where you can get with christmas equips+some other things)you need to wear the items though
 "Anti-Idle: The Game"){kind=icon}
 "Icebreaker"){kind=icon}
 "Wheel It"){kind=icon}
 "Shopping Cart Hero 2"){kind=icon}
 "Starlight"){kind=icon}
 "Bowmaster Prelude"){kind=icon}