How 1 address can create 14 inputs in output transaction to 1 direct address? Check this address 1NM3apKLeDGKiFsd6gu1o4nh52efi38iEv
The reason of this extremely high fee because of 14 inputs
But why 1 address generate 14 inputs instead 1?
When funds are sent to an address, the funds are locked into a UTXO (Unspent Transaction Output). When you want to spend funds, you create an input that references a specific UTXO and satisfies the corresponding locking script. It doesn't matter whether the UTXOs were sent to the same or to different addresses. Every UTXO has to be spent explicitly and separately. There is no efficiency gain to spending multiple UTXOs received to the same address in one transaction, each still needs its own input to be spent.