Thoughts about Dual-licensing Open Source software

“I was recently made aware that the above is no longer the case
with the standard MySQL OEM agreement. Sun is now, by default,
putting the following limitations on their licensees:

“You cannot modify MySQL in any way (for example to fix bugs,
optimise MySQL for your applications, include publicly available
enhancements (such as the BSD licensed “Google patch” or compile it
with another storage engine) to improve your MySQL as part of your
product.

“You cannot use any forks of MySQL (such as Drizzle, ExtSQL or
MariaDB).

“You are tied in to the current major release of MySQL
enterprise (i.e. you have to pay for upgrades). This may be normal
in a closed source environment, but not normal when it comes to
Open Source.

“There are serious limitations for what kind of applications you
can build with the MySQL code…”

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