If you ever do get to take a dispute to court, you may need to litigate in California (for non-EEA users) or Ireland (for EEA users), which could be costly and impractical for most users.
By using Pinterest, you grant the platform a wide-ranging license to use, display, and distribute your photos and content across their services. US users are subject to mandatory arbitration and cannot join class action lawsuits against Pinterest, which significantly limits legal recourse. You can opt out of the arbitration clause by sending written notice to Pinterest within 30 days of first accepting these terms.