Originally Posted by MidianGTX
You'll be frowned upon by people who notice, such as our humble community here... but if you're planning to drop quickly then most App Store customers probably won't understand what happened.
Personally, I think it's such a short-term deal that it's barely worth bothering with.
I released my first game in late 2009, it sold a few tens of thousands of copies at everything from $0.99 to $3.99. By the spring of 2010 it was down to a handful of downloads per day but we were given the chance to get on FAAD when it was still a new idea. This generated almost half a million free downloads. After it went back to paid ($2.99 I think) we made several thousand dollars from the extra exposure before it sank back to the handful of downloads. We did FAAD again in the autumn, again generating almost half a million free downloads and rather less when it went back to paid. Stupidly, I didn't cash in on the fact we now had a million users by adding IAP, I was simply to busy.
During that time I only saw a couple of one star reviews saying "WTF I paid good money for this, why is it now free?" or "how come I had to pay? my friend got this for free". There was no negative reaction in these forums at all as, even as early as 2010, people here had come to accept that game prices change as devs try to earn a living.
I guess what i'm saying is that very few users out in the big wide world know enough to even think they were ripped off and people here, where iOS gamers talk more than anywhere in the world, seem to be pretty forgiving about it. I'd say it's extremely unlikely that price changes will cause any negative PR unless you have millions of paid users but that'd be a pretty nice problem to have...