George Leybourne is believed to have been kept in champagne by Moet @ Co while he was singing 'Champagne Charlie' and, for all I know, Rickaby may have been sent the odd complimentary crate of Worthington to encourage him to keep the song in his repertoire, but the idea that overt advertising (other than on bar mirrors and safety curtains) was common or even permitted by music hall proprietors is, I am afraid pure myth.

Some authors of liner notes (like journalists and preachers) are apt to fill the gaps in their knowledge with little snippets of entertaining non-fact.   The 'live advert' story was one of them.