Adobe’s Photoshop Express is a great online photo editor, no doubt about that, but it’s not free (as in free beer). In exchange for using Photoshop Express, Adobe wants your photos.
If you read the General Terms, you’ll find under point 8. Use of Your Content. letter a. the following paragraph [via SPON]:
Adobe does not claim ownership of Your Content. However, with respect to Your Content that you submit or make available for inclusion on publicly accessible areas of the Services, you grant Adobe a worldwide, royalty-free, nonexclusive, perpetual, irrevocable, and fully sublicensable license to use, distribute, derive revenue or other remuneration from, reproduce, modify, adapt, publish, translate, publicly perform and publicly display such Content (in whole or in part) and to incorporate such Content into other Materials or works in any format or medium now known or later developed.
As I understand it, Adobe, for instance, reserves the rights to sublicense your photos in Adobe Stock Photos to third parties. Without sharing the revenue with you of course. After all, Adobe already offered you its service Adobe Photoshop Express for “free”.
To me, that’s a show stopper for using Adobe Photoshop Express. Luckily there are other excellent online photo editors around who don’t claim such farreaching rights on your content like Adobe does: picnik, pixer.us or flauntR to name only a few of them.

