It wasn't until 2000 (ten years after 1990 when the WTS had a price on each publication) that Nigeria was extended the same courtesy. Do I assume that Nigerian jws had no bibles to use? Rather it was that no NWTs were available.
*** yb01 pp. 18-19 Highlights of the Past Year ***Another factor in reaching more people with the good news has been the simplified literature distribution arrangement. Jehovah has blessed the faith shown by his servants in this matter. The voluntary donation arrangement is explained to people, but no charge is made for the literature. As of January 2000, that arrangement was extended to all lands where it was not already in operation. The Central African Republic branch wrote: "This means that anyone, no matter what his or her financial situation may be, can have the necessary printed material to become a disciple of Christ. This arrangement has been greatly appreciated by both the publishers and the public." Indonesia said: "Accordingly, the brothers looked for those interested in reading our publications more than those who could afford the printing cost."