I think you get it wrong, wagering requirement for Platinum 3 is indeed $1M but if it is counted from zero while the progress bar is shown based on the current VIP level (not from zero). Since his current level is Platinum 2, the wagering requirement to platinum 3 should be $500k so the calculation should be 2.3% of $500k = $11,500. AFAIK the standard/default bonus for reaching Platinum 3 is $800 but there will be still some additional bonus based on the current wagering activities.
Sorry if it's wrong but based on the total wager calculation is needed $ 1,000,000 for platnium 3 even though we have made a $500k wager in Platinum 2
So 2.3% must be taken from a total of $ 1 million as far as I know every level must be taken from the total wager. we still need more detailed explanations about this or wait for ryzaadit to complete platinum 3
As I said previously, the percentage shown in the VIP progress bar is from the current level you are at. But to make it sure, lets look at the example calculation given by the official staff of Stake:
Let's take for example that you are at 40% to Silver.
Here is one way in which you can calculate how much you need to wager to Silver rank:
$50.000 (requirement for Silver) - $10.000 (requirement for Bronze) = $40.000 (the new wager you need to meet to level up)
40 (%) X 40.000/100 = $16.000
That is the amount you already wagered, so you need 40.000 - 16.000 = 24.000$ more to wager to reach the Silver VIP rank.
Source:
https://intercom.help/stake-casino/en/articles/4974712-how-to-calculate-your-vip-progressPlease kindly focus on the bold sentence. With that example we can calculate for ryzaadit's case. ryzaadit is 2,3% left to Platinum 3 from Platinum 2, it means he is at 97.7% to Platinum 3. So the calculation should be as follow:
$1M (requirement for platinum 3) - $500k (requirement for Plat 2) = $500k (requirement for him to reach Plat 3 from Plat 2)
97.7% x $500k = $488,500, it means that he need to wager $500k (the requirement) - $488,500 (what he has wagered) = $11,500 to reach Platinum 3.