you are promoting is likely taking advantage of them in a pretty package that while it may be easy to use
It's very unlikely that OP is related to Vnish/Asic.to, he is just sharing his experience and maybe "possibly" promoting his Youtube channel, Asic.to has an official account here and I highly doubt marc would create a newbie account just to promote his "already famous" firmware, he would do it his main account. I also highly doubt that OP has the slightest clue that this is a modified version of Cgminer, 99.99% of people don't know.
Of course, I am not commenting on any "license violation" aspect, I am just saying that the majority of folks don't care about it, and that includes the main developer of Cgminer Con Kolivas, heck, not even Jeff Garzik who wrote Cpuminer (which the former forked) seems to give a fudge about people using his code to make money out of it.
It is unethical and illegal in some countries, but not everyone is willing to provide for free so this isn't a black or white situation, the original devs stopped working on the code, Bitmain uses Cgminer without providing the source code for all MOST of their firmware versions, and their firmware sucks, Vnish and the other guys took advantage of this and created a better version (of course, while violating the license), people are happy to pay fees to enjoy all the extra benefits they get, if Cgminer as is, or Bitmain's "improved version" was as good - nobody would use these custom firmware, but people paid tens of thousands of dollars for mining gears that came with a stupid firmware, you can't blame them for using custom firmware.
do you work for him? 
