My two great successes (or failures, depending, though you know me I'll take the former).
The SUPERDANA 66x outlet from 2023, now filling up search results in shit search engines everywhere (ok - and because of it, good ones too)
And the Iced Vovo with Marshmallow in multiple forms since ~1998, which has convinced more than half of my home country that they remember the days when Iced Vovos had marshmallow topping (it never did)