You can use your profile URL as an online contact card, it is absolutely FREE and will stay that way.

Ent1.org is a nice short and easy to remember domain, when choosing your URL username, try to pick one that people can easily remember.

Example of a good URL: ent1.org/johndoe

If your name is jane doe, choosing a domain like "ent1.org/rainbowsparkles" probably will not appear professional when sending out your link for gigs, but the choice is yours and completely up to you.