Donald Knuth offers monetary awards to people who find and report a bug in his TeX typesetting system. The award per bug started at $2.56 and doubled every year until it was frozen at its current value of $327.68. This has not made Knuth poor, however, as there have been very few bugs claimed. In addition, a person will usually frame a check proving he found a bug in TeX instead of cashing it.

Paul Erdos

The latin phrase "Non numerantur, sed ponderantur" mentioned in the previous post was (first?) quoted by Paul Erdos, author of 1475 published articles on mathematics (mass unknown) all considered "substantial" contributions. He was an immensely prolific and famously eccentric mathematician who, with hundreds of collaborators, worked on problems in combinatorics, graph theory, number theory, classical analysis, approximation theory, set theory and probability theory.

Some more quotes by him.

• A mathematician is a device for turning coffee into theorems.

• This one's from the Book!

(Said with regard to a particularly beautiful or elegant proof, refering a "book" in which God wrote the proofs for all theorems.)

• "Problems worthy of attack prove their worth by fighting back."
  

• Television is something the Russians invented to destroy American education.

How many publications do you need to get into MIT?
Non numerantur, sed ponderantur (They are not counted, they are weighed).

- Excerpts from a forum on Edulix, a popular website for wannabe grad students.

Jim Hacker: "So, is this [conversation] highly confidential?"
Major Saunders: "Well it is rather, yes."
Jim Hacker: "Shall I turn on the radio?"
Major Saunders: "Why? Is there something good on?"

- From the episode "The Whisky Priest"