I went to RHC in 2017, and have to say it wasn't as busy as I was expecting. Maybe the weather had something to do with it, but it just wasn't busy enough for a major company to see a positive ROI on sponsorship etc, possibly. It was 2017 I last attended.
I understand a lot of the content will have gone on social media, blogs and cycling print, so quite a lot of exposure. This isn't a dig at RHC at all, I thought the event was fantastic and well put together, but I just didn't find it that exciting.
This is 100% brand perception with no hard data, but I think the general public have lost their interest in RHC, and I doubt it'll be back again.
I really loved the branding of RHC, it's what cycling has needed for a long time. Again, another opinion, but the TDF is incredibly boring, as are the spring classics. I watch them because I feel I should, but then turn off.