Giving away isn't dickish. However, changing the terms to a license with more expensive terms of conditions is. Because of the requirement of providing source with "modified" versions, you have to now provide a source download with your software, even if you make the most subtle of changes. Furthermore, as most OS distributors patch their version, even using the provided version becomes legally suspect. All of this makes lawyers nervous, and more apt to just throw money at Oracle instead of having to do a ton of auditing at the risk of expensive court action.

I understand what your are saying yet I can't help but feel that you guys are being a bit unreasonable. You know what would be a dick move? If they killed the open source version and sued the current users of the open source license with some ridiculous patent claim. That would be a genuinely dickish move worthy of an evil empire such as Oracle. Yet they are doing exactly the opposite of that.