Everything seems to work on Iris.
Iris does not define spam but just block all content from the users that are not interactived with by the people you follow.
Discussion
Yes Iris global is working really well most of the time. I see little spam every now and then. Like 10% of the time? But it is not much, a few notes.
Just wanted to know more about its algorithm because I am contemplating on the idea that a spammer, with having no 'real' followers should provide more proof of work to be relayed.
I didn't see spam on IRIS. Nothing. I mean, if you use some others clients you can see REAL SPAM, people spamming QQ groups, spaming his servers as spamers,etc,etc,etc never seen that on iris.