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 away 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 via a casino 'listed' holding that wasnt simple to trade, % wise it was quite attractive but alot of doubt came with its returns 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.
I doubt that binance would care enough about it to make free wheel spins on FBC, that just doesn't sound like something Binance would even care to do. Remember this is a multi-billion dollar company that can pay you for absolutely nothing just to get more customers and that is what they are known for. They are known for losing ton of money by giving out money on the new listings and then they end up with more customers in the long run.
I have seen 200k or so giveaways on nearly every single new listing as a trading competition for example and they lose money on that however they get all that new people from the new coin as well. Those coins are usually listed in some other place first, binance is rarely any coins first listing, and binance gets those people out of that exchange and into their own exchange by losing money but then making profit long term.