In Discord chat I've used (different servers as well) people use and receive thumbs up plenty well. I've never had anyone tell me or or otherwise get any indication that thumbs up was "snarky" or whatever. I've even seen thumbs up and down used as a way of polling people on a subject. They click the thumbs up or down reply for a yes or no poll on something.
Meta + LMB/RMB has been a thing in tiling WMs forever and ever :)
In Discord chat I've used (different servers as well) people use and receive thumbs up plenty well. I've never had anyone tell me or or otherwise get any indication that thumbs up was "snarky" or whatever. I've even seen thumbs up and down used as a way of polling people on a subject. They click the thumbs up or down reply for a yes or no poll on something.