5.11 You understand that EasyChair Ltd may need and by posting Your Content you hereby grant EasyChair Ltd a worldwide, non-exclusive, royalty-free, transferable, perpetual and irrevocable licence (with the right to sub-licence), to use, modify, adapt, reproduce, distribute, prepare derivative works of, display and/or perform Your Content to the extent EasyChair Ltd deems necessary to provide the Service, including without limitation metadata removal or watermark addition, and to operate EasyChair Ltd's business, including without limitation for promoting and redistributing part or all of the Service (and derivative works thereof) in any media formats and through any media channels.