One would think the Zwift team would regard riding a full 100 mile century as an accomplishment to be celebrated and rewarded with more than a blackout jersey on which the “100” is virtually illegible and invisible. Not a jersey most would strive to earn and wear since it looks more like a stock Zwift jersey than a reward for a major achievement.
In contrast, on that black century jersey the Zwift branding is big, prominent, and legible as if advertising for Zwift were a concern when viewed from the rear by Zwift users.