I don't sense any difference between them yet. I have wiki and forum sections on my site (
http://SamyGO.tv ) and placed one for wiki one for forum and mainly earn from ebay links....
wiki is viglinked because of lots of a link to gadgets... Takes ~40 clicks per day and generates ~$2.5... And forum uses skimlink, got ~10 clik per day and generates ~$0.9...
But don't trust the numbers. For example one day, 13 click might returns both $1,04 and or $0.24.
I will switch my wiki to skimlink from viglink next month, than I clearly watch income difference between skimlink and viglink since there is same links for them.
Before I prefer VigLink because of there is no hidden fees. SkimLink share become %71.5 due paypal fees if you not live in US or UK.
At the preparation step of comparison, SkimLinks CEO contacted me and there is really good news coming thru. For example reduced level of payment threshold (becomes $10 from $50 ) and SkimLink will also pay PayPal fees for internationals... If those not happen, my choice is VigLinks, but now SkimLinks looks heavier...
But I never join VigLink If I know their tax problems.( U.S. want %30 income tax from alien foreigner! )
Regards,
Erdem