45% is including compounding per annum that never actually will occur.  Its a figure for comparison sake, like you can compare that to the figure given on FBC itself.   The obvious question really is can I do this 14 period then straight do another 14 day period, thats not yet answered.   I presume its done on a promotional basis to achieve a wider involvement, the important part is per person this is available right now but not likely forever.   
  On the longer terms stated it comes into line with what you can get if it were BTC and FBC and also I'd have to account for the lost premium benefits during that time.  Does Binance take the FUN and move it to FBC to collect free wheel spins.   I used to collect royalties on a casino via a holding and % wise it was quite attractive but its always return vs risk performance.  In that case I gained on the pricing as it appreciated with confidence people had in returns, maybe Binance has that idea and they run their own token so have the idea its a feasible plan.