IUUC the current code accumulate the payment to each pixel and whatever color has more accumulated money is chosen.
IIUC your code only consider the last payment and to replace the old color you have to outbid it, without any consideration of the previous payments.
Another strategies:
Penny auction: Whatever color received the last payment is the chosen one. This is more similar to /r/place
Generals.io: If someone adds money to the current color, then increase the accumulated money in that color. If someone adds money to another color the amount is discounted. Unless the result is negative and the color changes.
IUUC the current code accumulate the payment to each pixel and whatever color has more accumulated money is chosen.
IIUC your code only consider the last payment and to replace the old color you have to outbid it, without any consideration of the previous payments.
Another strategies:
Penny auction: Whatever color received the last payment is the chosen one. This is more similar to /r/place
Generals.io: If someone adds money to the current color, then increase the accumulated money in that color. If someone adds money to another color the amount is discounted. Unless the result is negative and the color changes.