We actually have a full set of In-App Purchases (IAPs) ranging from $2 to $99, as well as the $5 coin doubler. That being said, we're not trying to monetize by

We actually have a full set of In-App Purchases (IAPs) ranging from $2 to $99, as well as the $5 coin doubler. That being said, we're not trying to monetize by being heavy-handed and squeezing players for money with paywalls and the like. Instead, our in-game premium currency serves the purpose of "shortcut money" to alleviate frustration or grind. The game has been balanced to be pretty generous with giving out premium currency, and pretty easy to continuously play without pay, because then we can just monetize on ads instead. Better to make slightly less money from happy players than lots of money from pissed ones, we think!