This delay is enough to call this sig campaign scam? Personally i think that is time to leave negative feedback to Updown.bt profile (meh, btc foundation gold member and he can't afford to pay his sig users)
I will be leaving negative feedback in +-6 hours, since I gave him 24 hours extra to make the payment. It's 3.42AM over there right now, which means that he won't do much for at least 4 hours.
If I were in your Place I would have given him 72hours before jumping to conclusion , Yeah I can understand its already 3 days more then initial payday that was 5th july, but as OP mentioned some health issues maybe few extra hours only because he showed up on 4th july I don't understand why he'll do that if he intended to scam way before.