For security, some email programs automatically send emails with links to the spam folder.
No idea how may agents have that kind of set up, but I stopped including a link to my web page.
I figure they'll look for me online only if they are already interested in my work, or they'll ask me directly about my online presence.
If I don't hear back from an agent, I wouldn't want it to be because their email security settings, rejecting anything with a live link, prevented the agent from ever seeing my query in the first place.