>I've always been hesitant to use them for anything important because they've historically been known for very aggressively shutting down your service if their automated systems detect e.g. suspicious traffic.

FWIW, I've been running a seedbox in Hetzner's Falkenstein datacenter for yrears without issue. I only use private trackers + 1 public tracker focused on asian content, but they're definitely capable of figuring out that the my traffic is mostly torrent-related and have never taken action. The only time they've ever null-routed me was when I accidentally left a DNS resolver open to the world.