Yes it doesnt matter who are the real owners or developers of those coins, do you really need to know who are the devs? it would not affect the price because it is a forked coin.
And i dont think that satoshi created them, because they are different projects and we are going to receive the coins from them.
1) Who Development BTG and BCC ??
2) Is satoshi nakamoto Development BTC or other Developers
The first announcement of BTG was in this post: https://bt.irlbtc.com/view/207008.0 and for BCC the announcement thread was https://bt.irlbtc.com/view/1681719.0 so it is obvious the ones who posted them has some significant contribution to the respective cryptos.And this is false, the "bitcoincash ann" that you mentioned is not bitcoincash, that is the announcement of bitconnect, and those are very different projects.
And that bitcoingold is a deadproject, it is very different to the actual bitcoingold, it is not difficult to see it, because that ANN is from 2013...