Portable ADSB receiver

My question and the admin’s response on another data sharing site XXXXXX:

My Question:
Would XXXXXX use my data for MLAT calculations if I add Adafruit GPS HAT to my Pi2?

XXXXXX Admin’s Answer:
No. We tried this in the early days and it was so variable that it had no benefit over the “clock” in the receivers.
We timestamp within the FPGA as soon as the signal hits the front end, same place, reliably every signal.