The CEO made it seem like he himself didn't know how the math for the offer worked, and even when presented multiple opportunities to correct that impression, he made no attempt to convince anyone otherwise.
The reason is pretty apparent. They are bagholders. People like this show up in every thread about Gamestop boasting about how amazing Cohen is in a weirdly personal manner, and have a very fantastical view of how things are going to go -- because their investment depends on it, and they built a literal cult around the idea that GME would make them rich, which necessitates viewing reality a little differently from the rest of us.
Edit: Where Ryan Cohen comes in: https://youtu.be/5pYeoZaoWrA?t=6629
TLDR: half cash, half stock.
What a bizarre interview that was. The least damaging interpretation is he was intentionally being bad to spite CNBC in a basically (though their explanation doesn't include this) childish fit for earlier bad coverage of GME.