What is more likely, in my opinion, is that payment delays may be due to the high Bitcoin rate, since the commission for sending is small. Because of the small commission, the transaction does not even get into the network. This often happens to me when I try to send funds from a cold wallet and it shows me "not confirmed". Sometimes sending a payment hangs for 2-3 days.
if that was the case, you would see the unconfirmed coins in your wallet and you could actually spend them, assuming your wallet allows it.
my guess that's not the case seeing you posting about it here.
the fees did increase over the past few days from 1 sat/vB to up to 6 sat/vB, but the mempool isn't that congested, and could still get away with paying ~2 sat/vB and get your transaction confirmed in a reasonable time.
so the delay in your payment has nothing to do with the high bitcoin rate or transaction fees, it's just how it is with freebitco.in unfortunately. you never know when your withdrawal request will be processed.
72 hours have passed, but the funds are still pending payment.
nothing you can do about it, you will just have to wait.