As you can see, there are some restrictions for commercial usage.
* Commercial usage of the Valentina Server Free is possible only in the internal network. Web apps, accessible from the internet, can't use it as well.
* And it is impossible for developer to include Valentina Server (or Valentina Server Free) into own installer, distribute own license file. For such case Valentina Server Embedded should be used.
There isn't a regular discount for Valentina Developer Network. We used to bundle Valentina Studio Pro with it, however that just increased the cost. So we took Valentina Studio Pro out of it and lowered the price.
With the entry version of Valentina Developer Network ($599), you can deploy unlimited numbers of copies on all supported platforms (Windows, Linux, Mac OS X). This includes 5 connections for Valentina DB / REST / Reports and 10 connections for SQLite Server.