Here’s a quote from Falcon Pro 3 creator, Joaquim Vergès:
On the last version of Falcon, I really got screwed when I added the multi-user feature because people bought it once but had eight accounts. With in-app purchases, I can now have people with multiple accounts pay a bit more than the person who only wants one account. That way, I can also limit the people who actually have eight accounts, so now they think twice before adding them. With a free app, I would hit the limit immediately, so I put the price a little higher to make sure it goes slowly.
No. You didn’t get screwed when you added multi-user features. You got screwed when Twitter went insane.