So long as they don't make it a condition that the ports are turned up with Official Brocade transceivers. Also, you would have to start dicking around with verifying Brocade billing is correct. Far too much aggro, so only possibly interesting for new build-outs.
Last 4 DCs I designed I only put Juniper MX routing in the backbone with Cisco aggregation routers behind and Cisco switching gear.
Brocade aren't really any cheaper for comparable backbone gear and I wouldn't change or introduce more complexity than JNPR/ CSCO into the network because of the risk of compatibility issues and also to reduce support complexity.