Majidesuka Ska had 4 limited editions + regular edition.
This one had 3 limited editions + regular.
I bought 20% fewer copies of Only You than Majidesuka Ska solely because of that.
If you take into account that there's a large segment of the fans who probably did the exact same thing, that would indicate to me that there might actually be more distinct owners of this single than the last one.
It seems clear to me that raw sales numbers only tell a small part of the story.
Remember Suki Sugite Baka Mitai getting weekly #1 on only about 26,000 copies sold?
Reading the comments on YouTube from so many lapsed fans who absolutely love this song, I don't see the sales figures as a minus.
Plus, since when is a top 5 weekly ranking ever a bad thing?