The ESSCB points to the practice of paying women who donate eggs for reproductive purposes, which is not prohibited under New York law, and argues that donation for research purposes is not meaningfully different from that practice. You can read the ethics board's statement here.
An interesting difference in this case, however, compared with the reproductive instance, is that ESSCB will be using taxpayer funds to buy eggs. (Yeah, yeah, they're careful to say they're not buying eggs ... they're paying donors. Anybody buy that distinction?)