TikTok views issue

Hey so lately I'm into this issue, I'm located in europe and i im using USA sim card, airplane mode, location off, and im creating 6 tiktok account and posts 3 videos in each account daily, i've used to take 600 views on all of the videos and that was satisfying for my sales. But the past 1 and half month i've created new 6 accounts after factory reseting the phone etc, and now I get 600 views on the first video on all 6 accounts, and after I get only 60-90 views on all of the videos, what should i do?