[Stratoscope]

I suspect that when GP said "using", they meant "incorporating it into your own code".

No one at any company I've heard of or been involved with cares if you simply use, i.e. run, Linux or other GPL software. That doesn't affect the licensing of your own software.

What they do care about is if you take the GPL software and incorporate it into your own product.

[sigjuice]

I guess you are right. The OP said "buying" and I suppose in the trajectory my career has taken me the concept of buying code is foreign to me.