Interesting, I visited the website to check it and I notice that there is no maximum limit for your bet meaning you are free to bet even if you will be putting only a minimum bet. And for the Weight factor, will the amount of bet will be considered also aside from what you have mentioned to it.
Because I notice in the betting list that there are different amounts that were being wagered and maybe if I can get a clarification to it, I will be glad to participate to it. I am a little bit puzzled with the FAQ's, I am hope you can answer my little clarification here.
Happy to answer your questions. There is no maximum bet limit, but I would suggest to make many tiny bets instead of one big bet. You never know where the bitcoin price will be at halving.
The weight factor is pretty difficult to grasp at first. For example, the weight factor is 11.84409747 right now. That means if I bet 1 bit (=100 satoshi) my weighted bet is 1184 satoshi. After the round completes (halving) the payout formula is:
profit = (sum of my weighted bets in target zone/ sum of all weighted bets in target zone)
Basically that means you're getting an edge to all players that place a bet later than you. This doesn't mean that more money is added to the pot from us, it's just a calculation factor to favor older bets over newer bets.
A player that bets on the last day will only have a weight of 1, meaning he gets no additional advantage.
I hope I could answer your questions.