I tested the Paid Service of ViaBTC Transaction Accelerator with the OP's transaction hash. I don't screenshot it but details are below.
Paid accelerator service
Transactions
a71288f1dc6a9da53e56c79a16f0bb94540a1d68a618c3c793438ec80ba7ffca
Transaction Size (Current TX Size + Previous Unconfirmed TX Size)
136 Bytes = (136 + 0) Bytes
Payment Type
Total fee
0.0020672 BTC ≈ 53.08 0.002176 BTC
The fee for its Paid service, as of writing is 0.0020672
BTC or $53 equivalently. That is very expensive cost.