It's not so much 'Developer ease of use' but 'End user ease of use'. If end users can't use your product because it's blocked by their firewall then that's goi

It's not so much 'Developer ease of use' but 'End user ease of use'. If end users can't use your product because it's blocked by their firewall then that's going to cause you problems (either in extra support costs, or lost customers).