As of 2021, it is not accurate to say that Linktree is banned on Instagram. Linktree is a third-party service that allows users to create a single landing page with multiple links, which can then be shared on Instagram and other social media platforms.

However, there have been reports of individual accounts using Linktree being banned or penalized by Instagram. This is likely due to violations of Instagram's terms of service, which prohibit certain types of link sharing and account automation. For example, some users have reported being banned for using Linktree to share affiliate links, which is a violation of Instagram's policy against using the platform for commercial transactions.

Instagram also have some strict rules against using bot services or services which violates their community guideline. Linktree is not such service but if someone is using service to automate their account or posting spam links then they could be at risk of being banned.

Instagram has also been cracking down on accounts that use automation or third-party services to artificially inflate their engagement or follower count. If an account is found to be using such practices, it may be penalized or banned.

In order to avoid getting banned on Instagram, it's important to make sure that you are following the platform's terms of service and community guidelines. This includes not using automation or third-party services to artificially inflate your engagement or follower count, and not using the platform for commercial transactions such as affiliate marketing. Additionally, it's a good idea to review and update your Linktree page regularly to make sure that all the links are working and not outdated.

Overall, Linktree is not banned on Instagram but it is important for users to follow the platform's terms of service and community guidelines to avoid any penalties or bans. It's important to use Linktree and any other third-party services responsibly and in a way that does not violate Instagram's rules.