things that got me banned :
(-)UPGRADING ALL OF THE CARDS. (except the main decks, choose your MAIN DECK wisely so that you dont need to upgrade a WEAK CARDS unless u wanna USE IT FOREVER, instead DISCARD all other to BOOST your main deck cards)
(-) BUYING POINTS for butt pass/chick pass or whatever battle pass you name, why? rewards not worthy and HIGH BAN! legendary cards chests reward? WTF i rather hit summon 5000+++ chests instead, its safer on my accounts on my cases on my blocks on my EXPERIENCE-BASED.
(-)GAINING EGGS on egg EVENT in a short time furthermore TRYING TO COLLECT CARDS from egg EVENT chest and then i got banned by playing the EVENT battle or EVENT journey? whatever,, yeah i got BANNED try to defeat the last boss of CHAPTER 2ND.
(-) PLAYING PVP with a FULL CHESTS on SLOT. (i dunno why but i recommend to open any pvp chest immediately cause i got banned when having full chest on league 20TH and about to open my level 19TH league up chest reward)
(-) i've been SUMMONING/OPENING 5000+ CHESTS AT SHOP in two days NOTHING GOES WRONG, its just a NORMAL THING and SAFE but then i got a NOTIFICATION such as "ACCOUNT IS USED BY the game master i think, etc. NEED TO RESTART the app"

my GOLDS still 30K(from reward;NEVER BUY GOLDS) , my GEMS 2,900± , my EGGS 13K i think, my league at 15TH legit(its hard staying at 15TH league have been up and down a league lol) , free 200 NUTAKU GOLDS = free VIP 1. i thought that was my moment to got BANNED but no. it just CHECKING around or maybe put a script to LIMIT my ACTIONS IN GAME and if i try to do it it will AUTO BAN or script to MONITORING me in ADVANCE. i still got NO BAN like i have 34+ LEGENDARIES cards on LV 5-6 like i have LITERALLY collected many cards from league 30th to 15th league inside my decks but its not ENOUGH until "I TRIED TO COLLECT THAT LEGENDARIES CARDS AT EGG EVENT" then i UPGRADE these cards and REBORN and EVOLVE just like what i did with another LEGENDARIES and that's what TRIGGERING the BAN (i think) or maybe my EGGS point go HIGHER than 25K i'm not sure why but BAN is a BAN
(-) SWITCHING mod apk and original apk. yeah i got banned when i tried to reduce my golds and gems by upgrade cards and summon it. just stay in mod or gain a certain amount enough to play it normally on original apk.
(-) JOINING or CREATE GUILD? im not sure but i think it makes u easy to find and reported by player eventho the GAME MASTER can MANUALLY see your purchase LOGS or ACTIVITIES happen on your account like in my case they TRIED to log in with my account cause i NEVER log off 24H straight(charge phone and never close the app lol) they KICK me from the game by log on to SUSPICIOUS ACCOUNT RELATED and there goes NOTIFICATION of "account used by.." and have me to RESTART so they can MONITORING me cause their SYSTEM CAN'T. yeah that means THEY are there just PASSIVELY-ACTIVE treat & take care their game. hmm, so sad there's NO WAY to avoid BAN tho.
" i just want to collect all legendaries and see its battle vigorously

i guess now i just create a new account and collect all cards but play only in training mode, no more pvps, no more daily weekly achievments or even medals, no more events, no brawl, no pit,journey nothing at all. just training mode " cheers, GOD BLESS YOU.