I just saw a recent tweet from Mithril Project that they are asking CZ to return their 200K BNB deposit as requirements for their token listing after their token recent delist. Im positive this info is part of there NDA which Mithril already break since there partnership is already over so theres no way for them to lie about this info. Binance is really charging a huge fee in the form of buying huge amount of BNB (by that time was 8$ per BNB).
You can check the tweet post on this link
https://twitter.com/mithdotio/status/1603356872303865856?s=20&t=5hIis_1XvXWNjdQh0ubVVgOk that seems weird. So according to Mithril it's a security deposit that they get back, not a listing fee?
What i find weird is that (i don't know the exact specifics because of NDA) least one of the companies i know got listed almost free if i have understood correctly. And they sure as hell didn't raise so much in the private sale where they could afford $1,6M in bnb for listing fees / security deposit.
They just ended up minting little more of their tokens in BSC as part of the deal i suppose, but that's all.