The primary purpose of the foundation is the advancement of education by providing student assistance.
The main objective of REF is to support education in Western universities by helping to clear financial and informational hurdles. REF provides information related to admission and pays the fees related to exams required for admission (GRE, TOEFL and SAT).
In the interest of full disclosure, I am one of the students assisted by this organization, back in the early 2000's. My opinion on REF is based on the email communication I had with them during the application process, on what I read about REF on their website and in their annual reports, and on a direct interaction I had with one of their volunteers, whom I happen to meet, many years after REF paid my exam fee.
I like what this organization stands for, the fact that all is very transparent (full annual report with all donations and expenses published online at www.roed.org, and that all this organization achieved was with a small core of dedicated volunteers.
I strongly recommend REF as a non-profit created and run on the highest values, with the best students' interest at heart.