I've been writing and editing with LoveToKnow for three years now, and I'm one of their most prolific writers (30-40 articles per month and overseeing 6 sites on the network). The pay is $20-35 per article depending on a writer's level and the type of article, and LoveToKnow also pays for photography (stock or personal). International writers can be hired if they have native English skills and can accept Paypal payments (and meet other requirements) -- currently we have writers in the United States, Canada, and Spain. Writers who edit are also payed flat rates for different types of editing work.
The pay rates may not seem high, but with practice it is possible to write one article -- research, write, edit, publish -- in an hour or so, making a rate of $20 per hour at a minimum. Not too bad, really.
I'd be happy to answer any other questions, here or privately. Cheers!