Sending a million messages costs almost nothing, so it pays even if one person in a million replies. The filter is what stands between that and your morning.
The drawing that proves the sentence above. It is the same card that is in the book.
Think of it as
flyers stuffed into every mailbox on the street.
For example
Forty messages arrive about things you never asked for. Sending them cost almost nothing, so it was worth sending to a million people.
This is one card out of 275.
The hundred words you meet most are free — the whole set, animated, in one file that works with no internet.
Volume 1 has all 275 in fifteen chapters, with Staying Safe the largest chapter on purpose.