Ah I remember the days of TSU was sad to see it go belly up but with many social sites that attempt to give people money spamming becomes a major issue. I have a strong feeling Steemit will see this and already has however spammers honestly hardly make nothing compared to those who really contribute value to the community and they are rewarded by other members that care about the success and growth of the community.
The first thing I noticed when I joined here a few short weeks ago was how positive and amazing the community here is. I expect this to continue and those spammers to be shunned and kicked out. I also love how there is a bit of a review process for any new sign ups I believe that is the first step to keeping this community golden!