We raised from 14 to 19.50. Churn from the rise: 2%. The letter, annotated:
Paragraph 1: what improved, specifically (DATEV export v3, 40% faster, three customer names). Not "to keep delivering value". Names and numbers. Paragraph 2: the new price, the date (60 days out), and the grandfather clause (annuals keep old price one more year). Generosity with a deadline. Paragraph 3: the downgrade path, spelled out. "Prefer the old price? Here is the smaller plan." Exits with dignity convert back later. Trapped customers poison reviews. Paragraph 4: my name, my phone number. Two calls came. Both stayed. The phone number is the whole trick.
Full letter text in reply one. Steal it, adapt the numbers, keep the phone number.