In the article, he covers these three strategies:
- Free Download/Try Before You Buy IAP Unlock
- Driving In-App Purchases With Opt-In Ads
- IAP Linked to Incremental DLC/Expansions
"While these aren’t ideal revenue models for all mobile games," writes Bill, "they’re especially worth considering for already-published games, and titles currently in development on the assumption that they’ll be premium-only."