Removing tokens for credits would allow people to trade credits for tokens at a fair, reasonable price without unlimited token farming. just make an option where you can buy credits with real money. that will make the game much more balanced, say $5.00 USD for 40,000 credits and 40,000 credits for 200 tokens since it's $4.50 USD for 200 tokens.

sorry but this would ruin the game currency and cause it to shut down due to lack of funds to keep it running