I run a self help site and I'm wondering if it is worth my while allowing a link swap with what I think is just an MLM farm? It may be useful for my readers, because MLM can work, but I suppose what I'm asking is how fussy should I be about my link swaps? I would definitely never link to an ad farm but MLM at least has a little value for people willing to make the effort.
I use to be a member of a MLM company many years ago. I know the shady side of the business. Personally, I wouldn't, but that doesn't mean that Google may or may not look down on it.