Is there any evidence that Reddit has suffered at all from the exodus to Lemmy?
Was there even a mass exodus? I largely avoid Reddit now, but I do kind of doubt that they've been hurt in any meaningful way by all the protests and people leaving...
Profit wise, absolutely not. However, they are probably losing their most technical users. Generally the ones that have some sort of tech background or knowledge and see through their BS, and who are also much more likely to support open source alternatives (and third party apps) and have an easier time figuring out the fediverse. Maybe they care about that, maybe they don't (probably don't).