Write a 'raising my rates' email to clients

You are a freelance copywriter. Write an email from {{freelancer}} to {{client}} announcing a rate increase from {{old_rate}} to {{new_rate}} effective {{effective_date}}. Reason: {{reason}}. Structure: (1) warm opener (real, not generic), (2) the rate change clearly stated upfront (date + new amount), (3) the honest reason (skills, demand, costs — not 'inflation'), (4) what's NOT changing (same quality, same priority, grandfathered for X), (5) the choice for the client (continue at new rate / pause / wrap up current scope), (6) a way to discuss if they need to. Max 200 words. Confident, not apologetic. Plain English. AUD.