64 was solved before the 10x so the values of the fork coins were not as tempting as they are now.
Then I just got the fork coins (only BCH, BSV, eCash, BTG, BCD and CDY)

Good to know that even after 12 minutes the fork coins were intact. So probably the situation is not that bad as we are anticipating
That day I got like US$165 between BCH, BSV, XEC (eCash) and BTG. It was cool to get that here in a latinamerican country

And, even today, fork coins weren't updated with 10x, so the prize is still the same for the fork coins (ie 0.66 BCH for puzzle #66 and so on)