Add tips on how to write benefits

[brandonhaslegs]

When setting up benefits, the user should be guided a bit more. I notice that people are entering levels of support in this field, which I think makes sense!

Could be cool to show an example above the field. Something like this:

Example benefits:
10 - Your name on the last page of my book
100 - Your name as a background character in my book.
1000 - Your name as the main character in my book.