The reason why they offer 100% affiliate commission first month because they're almost certain that the trader will lose all of his money. Not a bad thing for Affiliate like us thou. The bottom line is we get our paycheck
If you look closely at their landing pages, they're geared to target newbies, who think that they can make a decent money off Forex easily... I've been learning and trading Forex for 2 years and have lost a good chunk of money before managing to stay above the 'water'. Although it looks damn easy to make money trading the demo account, you'll never experience the same results trading live account after factoring emotions, i.e. fear.
IMHO, Affiliate Marketing is far more lucrative than Forex Trading if you do not have sufficient capital. If you ask me, I'd rather spend 9 hours a day writting an ebook than to stare at the charts making ~30% growth per month.
Anyway, the point is, opt for 100% commission (instead of 25% recurring) because 90% of those who make their first deposit with eToro will never make a 2nd deposit ever again.
Thanks for sharing this method, AffGuy. Although I wont be signing up for etoro, but I'll definitely promote etoro.com on my site.