1. Get people who are ready to play with their own money to come to your site. Advertising bonuses is fine, but the motivation should be the playing and not the bonus alone.
2. Help them make an intelligent and safe decision about where they want to do play.
3. Keep the site fresh so when they came back to look for more they will find something new they can trust.
4. Always take good care to give players what they need and want.
Then ten visitors can bring more income than 100.
The average deposit per visitor depends entirely on what you do on your site.