Because I know Linux and I am willing to teach what I know.
Its there, just read it again ...
I'm impressed to see that this is really your first account around here. Now I understand why you missed my point, let me be more clear.
What do you have to show to support your Linux knowledge ? If you don't understand why this is important, consider that the person listening to you doesn't know Linux, and it would suck for this person to listen to a guy that knows bullocks about the subject. By answering my question you show that you are a honest person and is more likely to have any actual paying client.