I don't know why my spam dropped so significantly when I moved up to Canada but it was quite dramatic compared to the US. There are periodic waves but I tend to miss out of them - I suspect because Canada works hard to prevent dumb auto-dialers from working.
[0] https://www.cbc.ca/news/business/crtc-telecom-call-authentif...
I used to get perhaps 3-4 calls a week from the same Indian sounding scammers (a man and a woman). They call from UK numbers. However, since I got the pixel, it has a setting to block spam calls, I have not gotten any :)
It‘s not nearly the same extent as in the US, though.
> Haven't received a spam call in years.
Ditto.
From Poland: I have two numbers - one I use for various services, and it's constantly bombarded with spam (multiple calls a day), one I only use to contact family members, sometimes some small companies like when ordering firewood - got two phonecalls from an unknown number within a couple days (and I didn't care to answer), and that's it for almost a year now.
I do the same thing. One phone number is just unusable and I don't answer any calls anymore, mostly UK callers recruiting, or other random spam.
The other, which I don't give to almost anyone except close friends/family, gets no spam. Not sure where my first phone number ended up to become spam target, but I remember I got a call once, when that was really uncommon, which an offer to change insurance companies... I was pissed off with my previous company so I actually did it, and it actually worked well, it was not malicious... but since then I think I was added to a list of "spam-friendly idiot" or something.