This is right, and you are probably risking all your funds to get those shitty coins, be careful about this, the same happened with Bitcoin Gold and their shady wallet, a guy lost more than 200 bitcoins for doing this practice.
you must put your remaining Bitcoins on a Supper Bitcoin wallet supported. But, I think most of the exchanges would not even distribute the Super BTC to it's users.
If you are going to be a fork hunter then the best thing that you can do is just put your money on binance, they are giving out and distributing almost all the forked coins to bitcoin holders in there.
They are probably going to be the next great exchange for the next year.
Dont trust on the official wallets, there is no way to get those coins that are worth less than $10 each.
and for arguments sake, lets say im holding 50 bitcoins .... would you trust binance enough to transfer that much there??