when you at level 2 you can add clicable links in source. Answer the questions related to your website.
they will report you very fast on yahoo answers if they think you are sharing too many links to the same source. It is spam as far as they are concered. You MUST mix it all up.. post links to other sources (they can be related to your subject matter) and then answer questions without any links. Do this with a nice mixture and you will avoid the "yahoo answer police" or members who just want to hurt you because you are "competition".