Hi Authors, I’m looking for contemporary romance editor recommendations and line/copy editors. Thank you!

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An author who I consider rather successful told me this morning that when she (her assistant, actually) sends out her newsletter, a few days later they'll send the exact newsletter out again to everyone who didn't open it the first time. They just change the subject line. She said that 30-65% of the people who didn't open the newsletter the first time will open it the second time. I thought that was wild! Has anyone here done this? Did/do you see similar results? I was thinking about trying it.

listen to THIS do it 30 days in a row and let me know what happens :D