Something similar happened to Sega's Shining Force for iOS. I paid $1.99 for it around 2013 or 2014 and it was great. Shining Force is one of my favorite games for the Sega Genesis and it's perfect for on the go mobile since it's a turn based strategy game. I hadn't played it in a couple of years and got an itch about a month ago so I loaded it up with much anticipation. Turns out sometime last year (or late 2017?) Sega had updated it to include ads and in the process wiped all saved games for all users. Now there is a premium upgrade to remove ads which, from what I can gather from the reviews, doesn't actually remove all of the ads, just some of them. Oh and you can't play without an Internet connection now since all save games are stored off device on Sega's servers. I don't ever leave reviews for apps, but I was so angry I had to vent somewhere. This kind of shit is absolutely unacceptable garbage and everyone involved in the process that led up to it happening should be ashamed. At least I'm not out $30 though. Yikes.