The majority have moved away from cold calls and on to email and texting where they aim to trick folks into calling them. This is a better return on their investment since it’s cheaper and there’s way more chance to actually get a victim than cold calling.
That said, most of the folks on the phone are either barely scraping by or are literal prisoners of violent gangs. They aren’t the ones to target (though they are the easiest to dislike since that’s who you end up dealing with). Take a browse of channels like scammer payback and kitboga who work to get to those actually in charge and to get the scam rings taken down.
I don’t think so, tips are for service and moving my bag of food from the shelf behind you to the counter in front of you isn’t service, that’s just your job. I tip waiters, bar tenders, and drivers (delivery, ride share, cab). That said I’d love to get to a point where we can largely get rid of tipping by forcing full wages for all jobs and not tipped wages.