I know this is a long shot, but thought it would be worth trying.
Personally i live in South Africa, and the exchange rate from rand to dollar is R18 for 1$, that means i pay R90 for 500 reward points. A bread here costs me R13, so that adds up to about 7 loaves of bread for 500 RP. I googled how much a bread in the US costs, it's 3.5$ for a bread, so it does not even add up to two loaves of bread in comparison between the two. I think some consideration should be brought in for the countries that have a weak currency to also be able to buy RP at an affordable cost. I know this will have a impact on the economy of the game, but i think it's a just and fair thing to do, and might even keep more people playing the game when RP is as affordable to them compared to people living in more well off countries.
I hope this post gets some consideration,
Keep up the good work.