you may use just one broker, but don't deposit all the capital with the broker, you may deposit around 50 percent if it would not hurt the initial margin required.
If you're a good enough trader to trade futures, data fees from two brokers are the least of your concerns. Think your broker is immune? Griffin 1999. Refco 2005. MF Global 2011. PFGBest 2012. Sure, you might have got (some of) your money back but your funds were locked in limbo in the meantime. Leave as little in their accounts as possible. Avoid segregated trusts where possible. Anyhow, I think you're undercapitalized - come back when you have enough to play the game properly.
Curious thread: one person (quoted above) gave the correct answer to the OP's question, and even produced a citation to prove it, but it looks like nobody else took any notice of it?
IB for North America: US Securities & Commodities Non-Professional Bundle (Includes all Stock, Options, Futures and Bond markets) United States Free (USD 10.00 market data fee if less than USD 30.00 in commissions per month) Yes, comagnum is correct. https://www.interactivebrokers.ca/en/accounts/fees/marketData.php?ib_entity=ca