The reason why some of the Old membersz added their exchange wallets address to their signature payments, mostly comes from the headeck that comes with moving Bitcoin sometimes when the meme pool is congested and transactions fees get skyrocket..
They do this with aims of avoiding the high fees and delayed transactions, but what they must know is that, as they keep enjoying the easy exchange of their payments to Fiat, they should know that they are losing privacy, freedom and control of their assets at any point in time.
I believe that's no reason for someone to take the risk of getting their accounts or funds frozen, because when you make a transaction in a centralized platform, they have all the rights to do anything they want, because we have given them consent when signing up, so we can't do anything about it if they think our payment or funds we received aren't clean. I'm not saying that funds from signature campaigns are not clean, but I'm just talking in general, because problems won't tell you before they arrive.
That is why, it's always better to use a non-custodial wallet to receive your funds, it is especially better for those who wish to hold their funds and not sell them immediately, because then they won't be facing any problems, at least not very soon. If in the future they want to sell them, if they care about privacy and anonymity, they should use a decentralized P2P platform for it, such as Bisq.