With this small time window, you would have to have used a bot to be able to buy an NFT at all?
It was presale and it was limited to only 1000 participants. Each participant can purchase up to 3 rollbots but the total amount was only 2000 rollbots for sale so yeah it was basically first come first served even when you are whitelisted. You dont need to use any bot at all though, you just need to buy it after the countdown ended
24 seconds are long enough, I've seen less than 5 seconds