Users don't need to understand anything about crypto at first. Splinterlands is even having a free delegation system, to assign SP to new players without enough Resource Credits. DrugWars even allows to have no Steem account at all, as far as I know. And NextColony is such a slow game, users can easily familiarize themselves with everything over time, including Steem itself. Particularly Splinterlands will be able to onboard new users via their upcoming mobile app and PayPal payment system.

Spammy posts are annoying but on the other hand are we simply used to the current form of feeds from our followers. It is already diversifying into tribes and special front-ends. Eventually, few will look at the overall Steem feed of a user and rather focus on community feeds. And within each community, everything goes according to the communities rules, including spammy posts, if they wish so.

I cannot say much about DrugWar. I started way back and never got the hang of it because I don't like the "thug theme". Also, they have integrated tons of new features just recently and I haven't had time to get into it. Like I wrote in the article, I think it has become much better and they devs are trying their best to make the game better. My favorites are clearly Splinterlands and NextColony.

NextColony is not using anything from your account and works with Steem Keychain. That means, they NEVER get access to your account in the first place, as the private key never leaves your local computer. Different story when you use Steem Connect instead but even then you don't have to fear any posting whatsoever.