I would like we could to make ideas what we do monetize complex HTML5 Games...
There some possible ideas:
-Ads & Sponsorship
-Purchase high class upgrades with real money
-Register & Log in to Play (eg. Premium Membership)
-Web Stores (eg. App Store, Google Play, Chrome Web Store, Microsoft Store, etc.)
-Episodic Entertainment and expansion packs
-Skill-Based Progressive Jackpots??
-Micro-Transactions (eg. facebook)
-Donationware (free games only)
-Pay Per Play - Pay for Time (like arcade machines)
-Foreign Distribution Deals (Too bad, there a lot of IE6 users in China)
-Pay for Storage Space
-Host Private Game Server
-Walktrough or Top 10 [Stuffs] Videos with ads in Youtube
-Sell Branded Physical Items
-Pre-Sell / Pre-order for cheap price
-Virtual Item Sponsorship (eg. Real life foods from company in your game)
-Lifetime Backup Game Service
-Real Time Virtual Gaming
-Promote your games using ads and Trialware/Shareware/Demoware/Timedware.