Who do donors value?

For some years, Waitrose have been running a charity scheme whereby customers who spend over £10 are given a token to deposit in one of 3 slots to trigger a donation to the charity they prefer. It's usually a small local charity and often I don't know them.

Just by looking at the columns of green token, you get to see if a particular cause is more popular than another - when I took this picture, they were even.

Of course Waitrose is a rather upmarket place and their customers may not be representative of the entire population.