The licences for open-source models are generally designed to restrict this kind of usage by big tech. See the "Additional commercial terms" of the Llama 2 licence, for example:

> If, on the Llama 2 version release date, the monthly active users of the products or services made available by or for Licensee, or Licensee’s affiliates, is greater than 700 million monthly active users in the preceding calendar month, you must request a license from Meta, which Meta may grant to you in its sole discretion, and you are not authorized to exercise any of the rights under this Agreement unless or until Meta otherwise expressly grants you such rights.

There is probably a need for an alternative term to describe these kinds of models, because they're not exactly open-source in the traditional sense