My solution for the bounty :

    There are 3 wallets that on opensea-polygon fees are being gathered to :

    1. 0x9b814233894cd227f561b78cc65891aa55c62ad2 (main wallet) → transfers the payment from the buyer to the seller
    2. 0xf715beb51ec8f63317d66f491e37e7bb048fcc2d (observes fees) → percentage of payment is transferred to this contract
    3. 0x5b3256965e7c3cf26e11fcaf296dfc8807c01073 (collects fees of NFT sales) → opensea gets 2.5 percent of the payment and rest goes to the artist of the NFT
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    According to the graphs and investigations done on the question raised in this article, we can see that on Cumulative USD Fee Volume each day chart on recent days fee volume has been more steady and range rather than increasing, so we can say that the amount of fees paid each day were very low that there is not much growth on the cumculative chart means the growth has been vey low.

    Although over all growth of fee volume was about 9 times compared to August first of 2021.

    According to the graphs and investigations done on the question raised in this article, we can see that on USD Fee Volume each day chart major trend was bullish until Jan 28, 2022 that peeked on that day and after that day major trend was bearish, specially on recent days that fees on NFTs has been decreased significantly compared to it’s peek amount that occurred on Jan 28, 2022.

    Fee volume on last day of chart which is Jul 18, 2022 has been decreased about 300 times compared to its peek day.

    According to the graphs and investigations done on the question raised in this article, we can see that on Cumulative DAI & wETH Fee Volume each day chart growth of fee volume of DAI has been very higher than growth of wETH and it kept growing each day much higher than wETH.

    on recent days fee volume of DAI has been 142 times larger than fee volume of DAI on August first of 2021.

    According to the graphs and investigations done on the question raised in this article, we can see that on DAI & wETH Fee Volume each day chart DAI’s fee volume shows more ups and downs with huge peeks on several days like Sep 3,2021 with 1,708DAI or highest one occurred on Dec 23,2021 with 2,147DAI and wETH does not shows that.

    Total fee volume

    Fee volume of DAI / wETH