Paul Kafasis
Thank you for your reply, I'm glad to hear that even after updating those that have purchased the in app purchase can continue to use it. Thank you for clarifying this, perhaps you should amend this article to mention that at the top? Just a suggestion.

In my eyes it has not put your reputation lower, just reading from other negatives comments on this whole problem which many people feel negatively towards Rogue Amoeba. Personally, which I feel is just Apple, again, monopolising the market.

Since the functionality of the original purchase remains, there's no need for any refund or discount.