What they are saying is that in a hypothetical communist/socialist society, even if the entirety of production is organized by workers, it doesn't mean that they aren't going to be productive in actually building stuff, nor that they aren't going to get stuff done.

How that relates to your argument I don't exactly know, but I guess it could be interpreted as saying that even if you admit that philosophy doesn't mean that you can't produce ""profit"" - especially if it is limited to software.

Also, in theory, you could be 100% accept communist philosophy yet operate a for profit business.