There’s no definitive answer to this and Instagram does not reveal much about it. We’ve observed that following accounts too fast on the web version of Instagram typically blocks you at 20 – 35 accounts whereas the mobile app seems to adhere to the Instagram limit of following 160 per hour.
What happens after 10k followers on Instagram?
Once you have 10k followers, Instagram will make it easier for you to get people to your website via Stories with the swipe up to link feature. Swipe up is the only way to get a direct link from your Instagram to your other web properties. And, it’s available in STORIES, if you have 10k followers.