Do you change your address every week to receive payment for the Signature Campaign, or do you just advise others to do so?
Well, let's be realistic, any signature manager would show me the middle finger, if I'd try to change my receiving address for every weekly payout. I use different payout addresses for different signature campaigns deliberately and I'm aware that all payouts of a particular signature campaign go to one of my addresses.
So far I haven't spent any of the UTXOs from signature campaigns and before I will, they'd likely go through a mixer or into a Lightning channel, the current kyc-free exchange service I currently promote or whatever procedure I see fit to regain pseudo-anonymity of my signature campaign coins. I might throw them into a coinjoin later like what Sparrow wallet offers. There's a lot of options available.
You see the difference? I avoid to mix those coins with my other coins. If I'm in full control, I use an address for just only two distinct transfers: first to receive an UTXO, then to spend that UTXO and then not again, simple as that. If I'm not in full control and dependant of someone else, like a signature manager, then I have to accept re-use of an address. But that's rather a deliberate exception. I won't give a generalized advise to use one address only for the sake of ease or "not getting confused" or other silly excuses.