I just read your newsletter. In an opening, you say "Hi everyone and thanks for subscribing." I haven't subscribed so your usage of "everyone" can't literally a

I just read your newsletter. In an opening, you say "Hi everyone and thanks for subscribing." I haven't subscribed so your usage of "everyone" can't literally apply to every reader. Is it possible that using "everyone" is appropriate in such situations even if the statement doesn't literally apply to every single member of the subset?