Binance is pretty straightforward in these fork matters. Bittrex isn't bad aswell but it took a long time for the BTG to arrive and honestly I think they didn't even give me my full amount I had BTC on my exchange wallet for a long time and only purchased altcoins a day before they credited BTG and I got the equivalent to BTC at that moment, so it was like 0.000004 even though I kept BTC in the exchange wallet for quite some time. Sucks could have gotten a nice portion of free money...