YouTube is offering its celebrities bonuses in exchange for multi-year exclusivity contracts, according to a new report, amid fears that some of its biggest stars will be lured away by competing video platforms.

The Wall Street Journal, citing unnamed sources, reports that YouTube has “been in a fire drill” in recent weeks to prevent its stars from defecting to competitors like Facebook and Vessel. YouTube stars say competing offers have been “incredibly attractive.”

Read more at the Wall Street Journal

Contact us at letters@time.com.