>>36595329Pretty much. Every trade is an attempt to get lucky.
If you happen to have any Pokémon from July/August 2016 and have yet to get a 10th lucky trade, then you can get up to 10 guaranteed luckies.
In this scenario, you trade the other person something sorta good from Gen 1, and they will trade you something worthwhile like a legendary, shiny, or other really good thing like Larvitar family, Chansey family, etc.
Otherwise it's estimated to be a 1/20 chance of getting lucky, before supposed improved odds for trading Pokémon you've kept in your collection for longer.