I don't really know to what extent this explains the reason for your question or not. I have heard the the Lockman Foundation who owns the NASB kept tight reigns in providing "'right's" for the general use of the translaton. Somewhat like Steve Jobs with Apple. OTOH, the NIV owners were extremely generous in providing proprietary "rights" in the use of its translation. (per Bill Gates philosophy)

All I know when I became a Christian in the late 70s, everyone discipling me were using the NASB. By the mid 80s, everyone were discipling using the NIV.

John Chaney

"having been firmly rooted and now being built up in Him and established in your faith . . ." Colossians 2:7