zx spectrum this side of the pond did the same. it worked for a number of reasons, some of which are mentioned in the post.

1) a computer was perceived as educational. even if it was for games. 2) games were so much cheaper. and could be copied so easily with 2 cassette recorders. 3) there were tv shows here on home computing showing how to use/setup/program to get kids interested. 4) they were cheaper. the zx spectrum had many faults (glares at rubber keyboard) but it was cheap. anyone could get one. and as people upgraded 2nd hand units came along even cheaper. 5) monthly magazine gave away free games to type in and later included on cassettes taped to the cover. 6) schools had some of these home computers and created instant support groups if you bought one that gave you access to help, support, games, software.