Strange, maybe I don't understand what 5% is, I have now for 72 hours over 1 Million Britcoins in my wallet and did get only 8 Britcoins interest, if I calculate it it must be 171!!! britcoins every day, 5% of 1,250,000 / 365 days.
Who can explain this?
BTW, according to Rich list I am number one, does that say anything about everyone else??
That's strange, your calculations were right and you should get 171~ BritCoins per day. Remember that your wallet has to be unlocked and online to recieve your 5% stake interest, coins also have to be staked' for 12 hours before you will receive anything too.
So leave your wallet open, online and unlocked for 24 hours and see what happens, if you still aren't getting the right amount I will look in to it.