contact
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the only one I use so far. expect a delay of a few minutes to 1 day when writing.
discord
guess the username.
it does not have dots though. beware!
other means
those are the only media I use most of/all the time.
you won't find me on Facebook, Twitter or any big social network.
some services I hold a presence in are Phoronix (often), Reddit (almost never), osu! (been a while since I played), and Roblox (same thing).