I want to add a few more things since you asked what you could expect: First of all, the notice to your users is fine in my eyes. You wrote "think about it, th

I want to add a few more things since you asked what you could expect: First of all, the notice to your users is fine in my eyes. You wrote "think about it, this is less than a cup of coffee!" and the funny thing is that I used something very similar. I guess you'll also receive some smart-ass answers like "but I can get a cup of coffee for 0.80€". In my experience, you'll always have some bored people who'd rather rant about the one-euro-per-month for HOURS instead of just earning 20 euro and be safe for 2 years. Customers are irrational. Also, you'll be in some sort negative feedback bubble. Most people who accept the new price will say nothing. So the emails you'll receive will sound negative. Always keep in mind that the 50 complaining people is a tiny little minority. Be polite to them, but don't question your decision over a few negative emails. Ultimately, I think your decision was right. It's the logical consequence and there is not really an alternative. And it might turn out very similarly to my situation and you'll have a great more-or-less passive income for years to come. You'll see :)