You should check binpress http://www.binpress.com (I'm one of the founders), it is a marketplace for source code. While 50% of the projects are not necessarily open source, the other half are open source projects where the developer also charge for a support license.
Many customers will prefer to purchase a support license in order to ask the developer a question. Some will create a feature suggestion and since they have paid, the developer is more likely to implement them.
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You should check binpress http://www.binpress.com (I'm one of the founders), it is a marketplace for source code. While 50% of the projects are not necessarily open source, the other half are open source projects where the developer also charge for a support license.
Many customers will prefer to purchase a support license in order to ask the developer a question. Some will create a feature suggestion and since they have paid, the developer is more likely to implement them.