Because providing you with source code provides you the best possible value for your trading-related dollar!

Source code is educational.

There is value in knowing how something is accomplished.  Knowing how provides confidence, or conversely, enables you to be aware of limitations that may be significant.  As your own understanding increases, the value of your source code holdings actually increases - because you come to understand what was formerly opaque, and learn to leverage it.

Source code can be modified.

If the code isn't exactly the way you'd like to have it - change it!  If there's an idea there that you want to build into another indicator, just cut, paste, and create that for which you seek.  If there's one thing that's incontrovertibly true about all the traders I've met, it's that each is an individual with personal interests, tastes, and preferences.

Source code cannot be orphaned.

No matter what happens to a vendor, his web site, or his licensing technology, source code will always be available for your use.  You cannot lose your investment in source code.

For these reasons and others, CodeForTraders prefers to supply source code whenever support and business considerations allow it.

As a software writer, it's my job to find the people who can be helped by the software I write and build a positive, mutually beneficial relationship with them.  I do everything I can to offer outstanding value in my products.  My customers are very pleased to get top-quality code at value-oriented prices, and I'm pleased to provide it, because we are on complementary journeys through life and the markets.

-   Progster