But if you're listening for 64, or even 1024 wake words, you won't get to the level of granularity people are claiming to observe, like in the other comment here where they tested "pool fencing". If you were putting together a list of 64 words, would you really include "pool fencing"?
The wakewords could be simply "buy", "cheap", "sale", "price" etc - and then collect the exact words around it. I bet the pool fencing conversation followed with the exchange of ideas where to get equipment.