Commit to one and if they have a week where they want to do another, just call it extra! They've done some great ones with special guests, but too much time now chit chatting non Golf stuff. The worst was Nick Faldo - did one and never heard from again aprt from odd videos.
Yes he's signed with Mizuno! No surprise as he plays their clubs anyway. He's quit doing club reviews too! Understandable as they won't want him plugging other brands, but Mark Crossfield is Srixon / Cleveland and manages to review other makes.