They earn x4 more, so for example, if we get 0.01 or 0.02 for a story, then if someone with FOM reads our stories it increase earnings by x4, so it's around 0.08 a read. It makes a difference in terms of quality, as I prefer quality over quantity. I rather have less good quality readers who are genuinely interested than lots of readers who are not particularly interested. Better still if they are FOM. So it means for every FOM who reads my stories, it's worth 4 times as much as a normal read (so in theory I need less reads for the same earnings). I feel it also attracts more genuine better quality reads. Yes, we surely need a community that is helpful and supportive for us writers.