As described in our Charter (https://openai.com/charter/): that mission is to ensure that AGI benefits all of humanity.
Also, what are the consequences for failing to meet the goals. "We commit to" could really have no legal basis depending on the prevailing legal environment.
Reading pessimistically I see the "we'll assist other efforts" as a way in which the spirit the charter is apparently offered in could be subverted -- you assist a private company and that company doesn't have anything like the charter and instead uses the technology and assistance to create private wealth/IP.
Being super pessimistic, when the Charter organisation gets close a parallel business can be started, which would automatically be "within 2 years" and so effort could then -- within the wording of the charter -- be diverted in to that private company.
A clause requiring those who wish to use any of the resources of the Charter company to also make developments available reciprocally would need to be added.
Rather like share-alike or other GPL-style license that require patent licensing to the upstream creators.