Here is my answer on Quora regarding @steemmonsters:

Steem Monsters is a real killer app on the Steem blockchain.

Its very loosely based on Magic: The Gathering and is great fun and addictive to play and has a business model that makes you want to buy cards to upgrade your characters but then lets you trade them with others making it an investment as well as a game.

I've just started playing it and am very impressed both as an (addicted) consumer and from a professional business standpoint.

It precisely combines the benefits of blockchain decentralisation (digital uniqueness & scarcity, trustless trust, and instant friction free markets) with a more standard centralised business revenue model (selling card packs and taking a cut on the market).

It is a perfect hybrid, taking the benefits of both decentralised peer production and centralised firms to produce a compelling product and a solid business.

After only 6 weeks it already has over 3000 users playing over 20,000 matches per day and growing very rapidly. It is far more compelling and usable than Cryptokitties.

https://www.quora.com/What-are-the-most-interesting-new-blockchain-applications/answer/Andrew-Paul-Stuart-Hamilton?prompt_topic_bio=1