"A good copywriter will usually charge $10-$15K plus a percentage of sales" -> ok, to be clear, all the copywriters I've worked with in the past (who call thems

"A good copywriter will usually charge $10-$15K plus a percentage of sales" -> ok, to be clear, all the copywriters I've worked with in the past (who call themselves professional copywriters) are paid salaries or as contractors. Never do they charge this much, and NEVER a percentage of sales. I think you're talking about a very specific kind of work, could you define what that is?