They don't need to provide any details at all. They just need to give people access to their model and charge them for it. That they don't do that and instead pay for external evaluations indicates that they believe people would be unimpressed if they could access the model directly. The only purpose of this press release seems to be making investors give them more money.
Could also be they don't have enough funding to sustain that many users, or even the infrastructure lined up.
If their model really is so much more efficient, they should be able to run it cheaply even on rented infrastructure. If somehow they got so many users that they can't even rent the infrastructure quickly enough and they have to make people wait in a queue, that would be even better advertising.