Great point, when using the API the photos used to train and generate photos are provided by the customer, and they must have the correct permissions to use them
If you make a tool that makes copyright infringement easy, and you demonstrate infringing use in order to market it, you're really asking for trouble.
If you care about your startup and its survival, I strongly suggest you focus your marketing on legitimate B2B use cases and avoid showing off how great it is at making deepfakes. It's one thing to turn a blind eye to misuse of your technology and a whole different thing to explicitly promote misuse as a product feature.
In Germany, a contract for such a service would be legally void.
(An example of this is the sale of radar detectors. Here, too, the companies claim that it’s the user’s responsibility not to use them for illegal purposes, i.e. speeding. But the courts don’t buy it. They say the companies know exactly what they selling, and they declare such contracts void. The fact that a user could, theoretically, use that detector in a way that would not be unlawful is irrelevant, since it’s empirically evident that the vast majority does not, and the very appeal of the product is precisely the unlawful behavior.)
That's not true if they cannot meet in person.
The legal aspects here are very interesting but I think they miss the point. This tech can be used to create photos with celebrities, but not only.