I actually couldn't more strongly disagree with everything in your comment.

"Scarcity creates value."

Not when it comes to the free flow of ideas. Free speech is far more valuable when it's abundance is increased.

Insofar as new users are unable to comment and post, the market for Steem will be suppressed. I recommend you give that more thought, and also consider the caliber of communicants you will enjoy who are actually willing to pay to play. SOC (SMTs, Oracles, and Communities) will work together to enable communities to exclude bots, paid delegations, or any given type of interaction, as well as the opposite. After some consideration, I expect communities that reflect the actual value of social interaction to perform very well, and those focused on mere mammon to be quite small (if emunerative, potentially). This is because society is far more valuable than it's mere economic aspects can account.

Mike Tyson once said that Don King would sell his momma for a dollar. That's a different kind of valuation than most folks find attractive, although there's clearly folks that value society so.

I don't mind memo spam at all. I only claim rewards very occasionally, when I remember to see if I have any, so don't see it. I admit I'm kinda odd, not caring about my personal finances at all, but I've determined that I'll occupy a box in dirt someday, and won't get to enjoy spending money I've accumulated during life. So, I do work I like that pays necessary bills, and spend the rest of my days with good people.

If I can take anything into the grave with me, my good memories of good friends will be in there.

That's more valuable anyway.