Where does this style work?

It works wherever plain text is accepted — bios, usernames and comments — because the letters are real Unicode characters, not a font.

Can I copy it together with other words?

Yes — copy the whole output and paste it next to plain text; every letter stands alone.

Flipped letters — fun captions and jokes

Upside down flips text 180° using reversed and rotated Unicode forms (uʍop ǝpᴉsd∩) — the classic joke-caption style.

⅄onɹ ʇǝxʇ ɥǝɹǝ