I haven't seen one in decades, and even then it was usually some pamphlets or books to support a cause or the other.
On the phone (Italy), OTOH, I used to get daily scam call to buy "Amazon stocks" or change utility providers or install water filters. That seems to have massively faded out due to new regulations tho.
Only because you have not been profiled as lone and vulnerable, doesn't mean the practice doesn't exist:)
My local C of E cathedral sent out a mailshot during COVID asking for donations with a range from £50 - £1000 options on the card (yes, really). I've never had anything like that from JWs.
I get visits from the local air ambulance team looking for donations but I'd classify them as a charity, not a salesman. Even though the person is under contract (employed) to do the task of going door to door, it would be a charitable engagement and not a sale. I asked the last guy if he got commission - he said no.
I think your issue is with religion, not sales people, which is what this article is about.
Because then a marketing person could say "but I'm only trying to make you aware of $PRODUCT; I'm not trying to sell it!"
* Jehovah's Witnesses
* people offering to steam clean my roof/drive
* the local Fibre company trying to sign me up.
* well known scammers who claim to be on some kind of prison release scheme selling overpriced kitchen/household tat