The consultants and freelancers I work with hate sales.
A banner feels like another place to sell.
We need a paradigm shift.
A banner is another way you can help people. Time and attention are the most valuable commodities. How are you honoring people's time and attention with your profile?
Help them understand as fast as possible who you can help and how. Let those who don't need you go. Be the help that your target market needs.
Your banner is not about you. It's not even about selling. Like all things social, it's about connecting. Help your people connect with you.