To determine the anticipated load on an application, the number of end users should be considered along with?
Blockchains are decentralized ledgers which, by definition, are not controlled by a central authority. Due to the value stored in these ledgers, bad actors have huge economic incentives to try and cause faults.
What algo was the original solution to the potential problem as specified by Satoshi?
Pending transactions on the Ethereum blockchain are always ordered by highest fee paid to lowest, and then written to the block in that order.