This is a great question...
When I write copy I consider it a marriage.
I will usually provide several headlines and pre-heads with the original copy for split-testing.
With email copy I provide multiple subject lines and sometimes multiple opening paragraphs.
I'll keep suggesting copy changes and other changes to your marketing process that you can split test to increase your sales for months, even years after I've written the copy.
I've found this is in my best interests anyway because:
# I do a lot of deals that include a percentage of turnover
# You make more money which means you can hire me more often and at a higher rate.
I would rather have half a dozen clients I help to get very rich than 50 clients where I barely know their businesses and just write off copy as fast as I can to make a buck.
I also have a service I run with my technical geek friend Frank Bauer where we write and split test 4 changes to your website copy for a very modest fee.
Very few copywriters do any real split testing work but the best of us love it because it's where we learn what is working in the market right now.
Check out the copywriting/split testing service at the first link below.
Kindest regards,
Andrew Cavanagh
4 changes to your online copy written, split tested and 100% guaranteed to increase your sales 27 Copywriting secrets revealed in these samples of online copywriter Andrew Cavanagh