It says "built specifically for use with", not "only works with". Is there anything that says it cannot work with other sources of fuel, either natively or at least with some adaptation?
I've seen plenty of products whose marketing says "built specifically for use with (our other product)"; that doesn't mean it only works with that.
If you're building something that won't get deployed for a while, you want to take the design constraints into account that you're going to need to work with, not just those valid today. It's not unreasonable, if you think your design will both take a while and need to stay in service for a while to pay off, to include future-proofing.
I've seen plenty of products whose marketing says "built specifically for use with (our other product)"; that doesn't mean it only works with that.
If you're building something that won't get deployed for a while, you want to take the design constraints into account that you're going to need to work with, not just those valid today. It's not unreasonable, if you think your design will both take a while and need to stay in service for a while to pay off, to include future-proofing.