300 unique visitors is a low amount of visitors. People will be interested in your blog/website when you will have from 5000 to 10000 unique visitors. Why don't you link your blog with Google Adsense if you have unique visitors everyday. This way you will get paid from google and if you can make it to 5000 unique visitors daily google pay you more.
300 is low indeed, but for more visitors, more quality info is also needed.
I just don't get it, i allow everyone that can write about bitcoin to submit articles with ads and affiliate links, they can become admins, why they don't submit article if they can earn from affiliate links?
There are many problems:
* people can't be sure of how much they'll earn (if at all)
* people first think if they can get scammed or not
* people around here would better work for a fixed pay than for something as uncertain as ads and ref links
* many are not as fluent in English as you'd like and writing a longer text (article) may not be so easy
The only solution I see is to give some pay per article and
just maybe some % of the future revenue
as bonus.
This could attract some articles until your visitor count reaches much bigger numbers.