Roundtable Discussion; The Future of Mineral Sands. Watch the video here.
The current (at the time of posting this - it changes constantly) BTC 24 hour volume figures are 6317 coins traded with a value of $288,571,345. GS20 shows this value on its 'exchange' page (you have to log in to be able to see this page), though it doesn't show the number of coins traded figure. These figures are for all exchanges combined I believe - if you go to any exchange website they all agree (e.g. this one : https://www.kucoin.com/trade/BTC-USDT).
Where GS20 differs is that on its front page (i.e. the one you see if you click the 'GS20' icon at the top left) it DOES show the number of coins traded (but not the value - the opposite of what it shows on the 'exchange' page), but the figure appears to have been divided by 100, so it shows 63.17 coins. This applies to all five lines of different coins shown on the 'front' page - they have all been divided by 100. This is the puzzle, nobody knows why.
I din't understand what you mean when you say 'GS20 have then taken the decision to divide the aggregate volume by 100 on the main webpage - presumably to give an indication as to what their own volume is'. Why 100 ? Why does dividing by 100 indicate what the GS20 exchange volume is ?