I think its because I shared a raid from my alt on Dunwulf to attack my other alt
But which exploits players had use?
Just because devs do not limit alternative accounts it doesn't mean they are allowing you to circumvent game mechanics by plundering your alts for months. It is that way to allow friends using same ip to play together and not for you to cheat resources income. New alts automatically go to newest server and mess up players distribution which is a big problem already.
Now because you seem illiterate let me clarify what "exploit" means :
"make full use of and derive benefit from (a resource)."
For a former member of Overwatch with over 5k bans and another 30k+ in other games its surprising to see gaming company allowing huge ammount of violations go unpunished.