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I really despise receiving any call pitching a sale of any kind. More often than not, the call is from a competitor of a service I have, trying to move you over to their company, using deceiving techniques and not being transparent at all.
Then there’s the bunch that call to try to scam you with the lame pretext of “yurr computer has a virrus”, trying to lure you to install some software that will allow them to take over your computer.
There’s a bunch of crypto related phone made scam attempts, made by phony companies that lure people to invest in BTC et al, with the prospect of high returns. I’ve read cases of old people falling for this, waving good bye to a large chunk of their live’s savings.
I have therefore no sympathy for cold call phone sellers. In general, if one doesn’t opt-in, they should not receive these pestering calls under a B2C prism.