Frankly speaking, $24 per year per each active user is a pittance. That kind of money will not be sufficient for anyone to give up superior ease of use. If you think of Facebook as a subscription service, the ability to interact with all your friends using a really well-designed interface for $2 a month is a bargain. Of course, Steem right now makes it possible to earn a shitload more, so being on Steem instead of Facebook is a no-brainer. But getting the masses onboard will require much more than money. I'm not exactly sure which arguments would work best but I think they'd include but are not limited to: 1) total control over your content, 2) total control over your account, 3) the possibility to use your account to log into potentially thousands of apps, 4) the possibility to use the STEEM and SBD cryptocurrencies to send and receive money in three seconds for free to anyone with an account and 5) an opportunity to earn on your content without any risk of demonetization by unilateral decision by the platform owner without the possibility of appeal. I think the marketing of Steem apps should be a combination of at least of those five with emphasis chosen based on marketing research.