I'd assume because pigs have to be fattened before slaughter. At the small scale by literally throwing them scraps (pigs eat nearly anything edible). Meanwhile

I'd assume because pigs have to be fattened before slaughter. At the small scale by literally throwing them scraps (pigs eat nearly anything edible). Meanwhile in a pig butchering scam you have emotionally desperate people (who often would go for figurative scraps) being fed fake romance before being slaughtered (having a lot of money extracted from them, which usually ends in the end of the fake relationship as results don't materialize for the victim, e.g. the lover not showing up)