Raw transaction situation:

I try to send 0.00001000  with fee 0.00000011   (I use one input of 0.00001011)

error: {"code":-26,"message":"66: insufficient priority"}


Finally seems that minimum allowed fee is 0.00001000 for kb

I could send this way:

{
        "account" : "",
        "address" : "zAqG9VXQuAZhmAooSehTo6rkWJF6CSb9w4",
        "category" : "send",
        "amount" : -0.00000700,
        "vout" : 0,
        "fee" : -0.00000311,
        "confirmations" : 0,
        "txid" : "7677ff656c5b772c99df4b0cf56bdf67db6f246f71ef82f7e8da749acc79e4d9",
        "walletconflicts" : [
        ],
        "time" : 1504997860,
        "timereceived" : 1504997860
    }



But how a POOL  can exist if to use one unspent  0.00000001 or 0.00000010  I should pay 0.00000200 of fee?
(One unspent is about 200 bytes.  )
Now I understand -  there are no new blocks since pool (I think zpool) mines it only when there are unconfrmed transtacion in memory.

It was the main idea of coin?  To generate only blocks with transactions in it?