IANAL, but until the question of whether software produced with the aid of Copilot, thus potentially containing LGPL'd, GPL'd or even AGPL'd code fragments (you never know really AIU) is subject to these respective or other copyleft licenses is settled, I think customers are well advised to stay clear of using Copilot. To the best of my knowledge, github won't provide legal shelter if customers are getting sued for xGPL violations; GPL, OTOH, has sufficient case law to make using Copilot very risky.