Here's an idea:
Only give quality answers to relevant questions and provide some VALUE.
You know what that'll do?
First of all, your answer won't get deleted, like your question says.
Second of all, you might get traffic, sales, and additional exposure if you do as I said above.
Spamming YA really has not much benefit unless you really need a link that badly, which there are better ways of getting links with less effort. Just provide quality valuable answers to make your comment stick plus get traffic, sales, etc