Huh, that's somewhat surprising given bergamot fruit is not all that expensive. We may be spoiled in the UK but you can buy Earl Grey with real bergamot oil for a reasonable price here https://www.waitrose.com/ecom/products/brew-tea-co-earl-grey...

This was Twinings earl grey. Sure it's not high end stuff, but it's still no dollar bin tea. Royal warrant and all that.

This case is also from 20 years ago so I do think that it was real bergamot.