In reply to Neo.

As was pointed out by Neo, most questions and issues come within the first 8 weeks so 6 months vs. 12 only makes a big difference if you're reusing a theme over and over for your clients. In which case, you should be paying for ongoing support.

If we take SIDEKICK for example, we use a key system to ensure that you aren't using your single site license on multiple installs. Most Theme developers don't have that sort of tracking and setting it up is time consuming. So they have no way of knowing. An ongoing support fee is a great way to ensure that even if a single site license is being abused, that the author and Envato still make some sort of ongoing fee.

As far as the 30% cut goes: Envato is a marketplace, they make their money when an author makes a sale. In exchange, the author gets traffic, marketing and sales support. We can discuss whether it's worth it but the fact that there is a cut taken isn't "interesting", it's entirely reasonable.