What has been your experience with webinars?

Have always been (in my mind and experience) as super annoying thing that is typically a time waster and hype builder to convert people. However, these are just ones I've watched in the past. I know some are free and aren't sales - they've just left a bad taste in my mouth after poor experiences.

It seems people are in super fast mode, and the webinars they forget about. What about your experience? I get webinars are relevant for globalization.