The method to raise your interest from 4.08% is by investing in the FUN tokens? I am currently running my coins on the base interest of 4.08% and any boosted amount is always welcome. I thought the FUN token investment was a separate scheme altogether, meaning that two investment schemes were running on the site side by side - correct my if I was mistaken.
FUN tokens APY and BTC holding interest works separately. But your BTC interest rate will be boosted if you hold at least 12.5k FUN tokens on your Freebitco account. They were talking about that. Normally the interest rate is 4.08% for all users. The interest boost feature has been added with the implementation of Freebitco premium membership benefits (FUN tokens investment system).