This comment is pretty disingenuous. (I personally found it a bit obnoxious.)
The person you're responding to made it very clear that they were responding to your conclusion that "large SV companies and startup should also start agreeing to pay for open source, when it's the core of the tech". The fact that you have support and services available isn't a "gotcha!" that refutes the point they are making, which is that given that there is also a zero-cost "product" available, then (unsurprisingly) prospective customers prefer that one instead.
Which is _exactly_ what we are doing...