I don't. Seems pricey and I don't think I have a need/want for that feature, but maybe you have some good examples. Would the "check-in" photo setting meet your needs (it automatically sends a photo twice a day, but I can't figure out how to set the time).
Yes. Have my cameras turned off right now, but during season I add the $9 package they started last year (I think it was $9). Like cnelk said, used to be sure a camera was active. Also after dusk when I knew deer should be on the plot but had not received a pic. Nice option. Worth the price to me.