That is just not true.
One might get the impression from guys asking about refund here instead at FX directly.
(And not reporting back here when it succeeded)
To my knowledge, everyone who wanted a refund, got it.
At least there is no indication of anyone complaining about not getting money back after refund request with FX Service.

Good for us then that FX did no Crowdfunding but convinced some investor to back them.
Whole other situation imo.
Especially in this situation it is the difference of convincing few investors that a global lockdown is affecting shipment and not 1000 individual backers pointing out similarities with Youyota or Turing

/rumor
They asked current users for suggestions towards a next device indicating they might have had backing or at least planning beyond Pro¹ early.
/rumor read from private/unofficial communication, sry FX if that was intended to be kept secret.

EDIT, oh they asked slightly related in public recently: Tweet1 Tweet2