Everyone's already named the big culprits and hacks, but I'll name a smaller one. I tried Huel (UK soylent clone) a very long time ago, and a few years later,

Everyone's already named the big culprits and hacks, but I'll name a smaller one. I tried Huel (UK soylent clone) a very long time ago, and a few years later, I started to get phishing emails to the address I used. When I told them, they just ignored me. I'm fairly sure they were hacked or breached. The emails didn't contain any real info though, so I assume it was just their mailing list they lost.