COBINHOOD FEES (from their whitepaper):

4. COBINHOOD’s Business Models

COBINHOOD will launch

4.1  Margin Trading Loan Interest
Users can opt in to become margin trading loan providers and receive interest earnings
with their asset deposits. COBINHOOD will automatically determine the interest rate
based on margin trading loan supply and demand. A portion of earnings generated from
interest payments will be collected by COBINHOOD.
4.2 COBINHOOD Prime
Service for individual traders in 2018.
Traders can subscribe to COBINHOOD Prime    service for higher leverage on margin
trading, lower latency ticker, and higher trading API rate limit on COBINHOOD
exchange. Also, COBINHOOD Prime    subscribers will have escalated customer
assistance, dedicated phone support, a committed customer success account manager,
and 100% uptime SLA. COBINHOOD Prime    service will be subject to annual
subscription fee.
4.3 COBINHOOD High-Frequency Trading Server
COBINHOOD will launch its high-frequency trading server subscription service for
investment banks, hedge funds, and institutional investors. These servers will be hosted
on the same network with COBINHOOD order matching engine, providing ultra low-
latency ticker and unlimited API rate on the COBINHOOD exchange. Trading algorithms
can be deployed onto these servers for high-frequency algorithmic trading. The high-
frequency trading servers will be subject to annual subscription fee.
4.4 COBINHOOD ICO Underwriting Service
A percentage of ICO tokens underwritten by COBINHOOD will be collected as
underwriting service fee.

Hope that helps!