You keep ownership of the content you submit to MagicShot. Uploading a photo doesn't hand it over.

The license you grant

Under the terms of service, you grant MagicShot a worldwide, royalty-free, non-exclusive license to use, reproduce, modify, distribute and display the content you submit. That's what allows the service to process your uploads and show your results back to you.

Non-exclusive matters here: the license doesn't stop you doing anything with your own content, including selling it.

Using the results

On a paid plan, what you generate comes with commercial-use rights. See commercial use.