The user agreement T&C document is cause for concern. [1]

Specifically, sec 4.4:

4.4 You understand and agree that, unless proven otherwise, by uploading, publishing, or transmitting content using the services of this product, you irrevocably grant DeepSeek and its affiliates a non-exclusive, geographically unlimited, perpetual, royalty-free license to use (including but not limited to storing, using, copying, revising, editing, publishing, displaying, translating, distributing the aforesaid content or creating derivative works, for both commercial and non-commercial use) and to sublicense to third parties. You also grant the right to collect evidence and initiate litigation on their own behalf against third-party infringement.

Does this mean what I think it means, as a layperson? All your content can be used by them for all eternity?

[1] https://platform.deepseek.com/downloads/DeepSeek%20User%20Ag...