This edition doesn't include source code and has a limitation that requires the Indy version that comes with Delphi (Except the Enterprise edition which includes a custom Indy version). Delphi 7 requires to install a specific Indy version, check the Downloads page.
BASIC Edition is only for 1 or 2 developers, so there are no SITE licenses. The license allows to install the package in all the machines you use/need but there are limits about the number of concurrent connections from different machines. This means that you can open the IDE multiple times in a single machine, but if you try to open the IDE in a second machine, it won't let you to work with it.
If you have any question, please Contact us for details.