How are you filtering these jobs? Six jobs in a week (the interval between emails) seems a bit on the low end to me. Maybe you apply very strict criteria for including a job on the list?
I couldn't resist and applied a similar filter to the jobs / gigs I found for my own service, SendGigs. I require one of the the tags full-time or salary, and exclude everything that is tagged US-only. Then I'm left with 20 jobs, see https://www.sendgigs.com/2015-12-10
So at least to me it looks like there is a lot of remote opportunities for non-US developers. And it is getting better with more and more companies figuring out remote work.
I couldn't resist and applied a similar filter to the jobs / gigs I found for my own service, SendGigs. I require one of the the tags full-time or salary, and exclude everything that is tagged US-only. Then I'm left with 20 jobs, see https://www.sendgigs.com/2015-12-10
So at least to me it looks like there is a lot of remote opportunities for non-US developers. And it is getting better with more and more companies figuring out remote work.