Now, I'm asking: How will you confirm that they indeed chose to not include it since you know only your own mempool and not theirs.
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transaction inputs
utxo #0
size in btc: 0.5305910052255669
age in blocks: 43430
utxo #1
size in btc: 0.6277492538322264
age in blocks: 51426
utxo #2
size in btc: 0.03292092424977866
age in blocks: 23834
utxo #3
size in btc: 0.2721370957957041
age in blocks: 19943
utxo #4
size in btc: 0.7818320782631636
age in blocks: 28050
utxo #5
size in btc: 0.8452880194977738
age in blocks: 20873
utxo #6
size in btc: 0.2964992314423315
age in blocks: 52355
utxo #7
size in btc: 0.8428448040612679
age in blocks: 21731
utxo #8
size in btc: 0.8181116104020796
age in blocks: 9144
transaction outputs
utxo #0
size in btc: 4.824852643726152
sum2=4.824852643726152
utxo #1
size in btc: 0.1493581884735465
sum2=4.974210832199699
utxo #2
size in btc: 0.017812122850125043
sum2=4.992022955049824
utxo #3
size in btc: 0.052368161935472994
sum2=5.044391116985296
utxo #4
size in btc: 0.0020762735714105296
sum2=5.046467390556707
utxo #5
size in btc: 0.001475761181884893
sum2=5.0479431517385915
utxo #6
size in btc: 1.2914002376347624e-05
sum2=5.0479560657409674
utxo #7
size in btc: 1.795702892515294e-05
sum2=5.047974022769893
Determinations
transaction_size_btc = 5.047974022769893
transaction_ave_age=28215.68497442169
transaction_spread=1.125
Success: transaction age is acceptable
Failure: transaction spread is unacceptable
priority = sum(input_value_in_base_units * input_age)/size_in_bytes