Getting raided can happen to companies of any size, Mullvad comes to mind as an example of a company that's small, European and got raided, but it is incredibly rare. It's hard to overstate how exceptional it is, you need to either be on the police radar with a serious issue, or breaking the tax law considerably, or etc. I think the main reason you see this happen to a lot of American companies is that they expand to Europe, but try to do business the same way they did back home. Both the legal landscape and the moral landscape wrt it are very different in Europe, and trying to willingly evade taxes for example is tended to with a very heavy hand. If I'm not mistaken, that's what's happened to Netflix here: they already got caught evading taxes once, and now there's a suspicion that they're doing it again/still.