Paid for the app, then suddenly got flashing ads – 23,000 Great Quotes Review

I purchased this app a while ago and initially it worked just fine. Good quotes and a simple interface. After one of the updates, ads suddenly appeared in the app. They are quite annoying, flashing at the bottom of each screen, right next to the "Next" button. Mind you, I've already paid for this app, why am I getting ads now? This was not a part of the original deal. I might not have minded paying extra, but this whole ads situation was handled very poorly by the developer, in my view. Hence, a one-star rating and the removal of the app from my phone (i.e. no future ad "revenue").
Review by Jon Cramer on 23,000 Great Quotes.