Is it the industry standard for a full service broker-dealer charging 14% commission plus 20% profit after a stock goes public?

Hi all,
I have an opportunity to invest in xAI. This is currently a private company, and not a publicly traded stock.

The full service broker dealer is charging 14% commission off my initial investment. It is calculated in the purchase price. My “all in” cost is $47 for one share, but the actual cost of the stock is $41.

He mentioned keeping cash in an escrow account for accounting. If the IPO goes quickly they will issue a “special dividend” if the money is not used from the escrow account.

Fast forward to the day it goes public. We will be treated as an insider and Rule 144 locks us in for 6 months before we can sell any shares.

The 20% profit is based off a calculation period. This calculation period is 5 days before and 5 days after it goes public for a total of 10 days using a volume-weighted average price (VWAP). For example, if I invest $100,000 and it goes to $500,000 they keep $80,000 and I keep $420,000.

Of course, I would be happy with this investment and % of return.

SUMMARY: They have to pay to get the stock and there is a fee (sales concession, commission, everything else that goes into it) of 15%. The stock they are buying is directly from the company. I will be getting direct insider shares of xAI. As far as IPO, there is no guarantee it will go IPO. It will be illiquid until a liquidity event. When the stock IPO’s, 6 months after that I will get deposited my stock minus 20% in performance.

My question is:
With the 14% commission at the initial purchase of the stock, and 20% profit after it goes public in line with the industry standard? Thank you for your feedback!