Song licensing is bugged as of Jan 2016, and doesn't work at all for unlucky players who are experiencing the bug. Licensing songs is not a great money maker in any case, and tips are a flat price based on skill level. I would not recommend any traits/reward points devoted to it. I would take traits that boost inspired, and career boosting reward traits.
I've never been a fan of perfectionist. It essentially loses it's value once you have the skill maxed. A max skill writer/artist who can reliably maintain Very Inspired will produce a steady stream of best sellers/masterpieces without perfectionist. At that point the slower rate of production actually hurts your money making potential. Of course, by that point in the game you can have multiple sources of cash flow, so it might be irrelevant anyway.