Stats: author names are blank for stats in Jetpack sites

[designsimply]

Steps to reproduce:

1. Go to https://wordpress.com/stats/day for a Jetpack site that has multiple authors with pageviews
2. Check each author name in the Authors box to see if the names are displayed correctly

Result: Jetpack authors appear blank, except for one which displays the WordPress.com username instead of the WordPress.org username used to create the post.

Example, "Summer Details" was made by user design5279 and is missing while "Testing 123" was made by user wptester (Jetpack site user) but shows up as user552 (WordPress.com connected user):

^{Seen at https://wordpress.com/stats/month/disambiguously.com?startDate=2015-11-01 on a site with WordPress 4.3.1 and Jetpack 3.8.0}

/hat tip aheckler for the original report ^{(data/p1421163963000003)}

[designsimply]

Closing because this issue was originally reported over a year ago and has had no activity or resolution so far. Also, it is low priority compared to other issues in the same label.

[kraftbj]

The users need to have their account linked to WordPress.com to be associated to someone there for the missing name piece.