Giving them the benefit of the doubt: open models are often run on more modest hardware than commercial behemoths like GPT-4. Maybe they want to know what kind of hardware they'd like to run it on? Even the severely outdated 175B GPT-3.5 is still too expensive to run on most machines. We don’t know how unoptimized their models are. Releasing an outdated, unoptimized model is pointless, when much, much better alternatives are already available.