Is multifield update counted as one message or multiple?

When uploading 3 fields using multifield update (writeFields) is that counted as one message or 3? I'm asking regarding the 8,200 messages/day.

Thanks.

[Walter Roberson]

(Context is ThingSpeak)

Answer 1

[Christopher Stapels]

See the licensing FAQ, question 4.

And the answer to your question is one.