How most of the marketing Emails are going into update tab of gmail?

Most of the growth marketing emails (from the sites I have subscribed eg. trends.vc, billy gene, neilpatel, marketingexamples etc ) I am receiving on Gmail go to my Updates Tab. Does anybody know how they are doing it? I tried every famous Email Service Provider (Mailchimp, SendGrid, mailerlite, sendlane, mailjet) but they always send my emails to the Promotions tab. . How can I get it landed on the updates tab since it has a much higher open rate?? Any suggestions. PS: I am already following the best practices to make it safe from getting flagged as spam. My concern is only Promotions Tab.