Actually, there is no minimum salary in most of leagues in Europe. not only BBL. as far as I know, Spanish league is the only exception. NO suprise as it is the wealthiest league in Europe.
Once again, MOST of the main leagues have minimum salary rules, not just the Spanish one. In fact, the Greek League, French League, Italian League, Russian League, Turkish League minimum is the SAME as in the Spanish League. Also, FYI, the Spanish League is not the richest league in Europe. Although it has two incredibly rich clubs, that does not make it the richest league in Europe. The Russian League would definitely be the richest league in Europe.
Yes, forgot about russia. in recent years it has exploded. Yet, Spain comes second. Btw, no way russian league has minimum salary rule.