And do I get to pick my Lamborghini's colour? 
Probably yes. Freebitco.in haven't bought Lambo so far in case if winner will want to take money instead of car. So, I think that they will let to choose color of car.Any colour you like (if Lambo do it).
edit: I see Auto Withdraw's fee is limited to 3k sats. That's good but I don't know how long you can sustain it especially when btc hits $50k.
It was only during the last bull run when fees were extremely high that we introduced any fee at all on auto-withdraw. We will only increase that fee if costs increase to force us to.
This way is also not fair enough,
I think you are confusing your likes and dislikes with fairness.
Nope, I really do like it but somehow it does not make any sense to me when you do in that way. It will be just the same as the first time you set it in the end of month. 23th and 30th will be just one week difference so it does not make any huge difference unless there is some pump and dump like what I said before
What has that got to do with fairness?
I just explained and gave examples. Bitcoin can and has moved by large amounts in less than a week many times. There is an obvious advantage to closing betting when the market still has time to change the outcome rather than letting people pile in with huge bets at 23:59 on the day it is decided. No, it isn't the same.
So you are saying that if we bet the first time, that odds from my first bet will be locked? So any changes later on near end of the time limit will never affect on my bet?
NO!!!!! That is clearly not what I said. I said that you get a bigger time weight multiplier and that is not pointless.
I will win the current odds 2.67x?
NO!!!!!! You will win your share of all the bets placed on other outcomes at the end with the time weight multiplier at the time you bet applied.