Get EOS.io/distribution with Metamask working again in 3 clicks! (Unexpected end of JSON input)

1. Click the MetaMask icon in Chrome at the top right. (you may need to click the 3 dots to see it)

2. Click Ethereum Main Net. If you are using a custom server, click on the same position but it will say custom server.
   

3. Select Custom RPC.
   

4. Type in: https://mainnet.infura.io (or you can right click that link and select Copy link address if you are lazy) Hit enter (or click save).
   

Try the site now:

There is also the RPC server EOS.io put up, there is PDF instructions here. At the time of writing July 6th 2017, seems it is currently not working. https://eos.io/pdf/EOS_Custom_RPC_Instruction.pdf

For those who rather use their own RPC server, follow this guide: https://steemit.com/syntaxerror/@altruist/syntaxerror-unexpected-end-of-json-input-using-metamask-with-eos-token-distribution

If anyone has any further questions, feel free to post here.