Ted, The AOS is a reputable, reliable organization supporting all aspects of orchid culture. I was a member for many years before I retired and scaled down my association with orchids.
I'm not a computer guru, but the way I understand the webinars is you can sign up for the live programs for a fee, which gives you the ability to actually chat with the presenter. Most organizations that present webinars will keep them on file for some period of time, (I think AOS does this)and you can select these and watch them free, or perhaps for a much reduced fee at your convenience. You can pause and playback these, but no active chat. Hope this helps. Bill