Get the following Stats in Etherpad:
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Characters (no whitespace)
Characters (with whitespace)
Word Count
Revision Count
Saved Revision Count
# of Authors
Author Stats
Number of Words Contributed to
Number of Lines Contributed to
Lines as Only Contributor
Number of Characters (Including Whitespace)
Number of Characters (Excluding Whitespace)
Pricing is 400$ per commercial license, 40$ for non-commercial/explicit not for profit.