the brz has some much better options than strap-on racks due to the double thread-in recovery points in the rear bumper.
this thread has a lot of the options in it, there's a few other threads kicking around with similar options.
https://www.ft86club.com/forums/showthread.php?t=29963
i honestly haven't used any of this bike rack stuff since about 2012, but got it specifically got it all for the future.
i have a saris bones rack from before(got it for free, so the price was right). i never cared for using it when i had it, but didn't have any other options. no matter how tight i strapped it on, it always loosened up, and the rubber pads would end up sandpapering the clearcoat on the car in bad ways that i could minimize but never completely eliminate with detailing setups. i used scraps of towels under the pads to minimize scratching up the car, but that exacerbated the straps loosening up.
i never lost a bike, but i admit there were a few times where i was surprised i didn't.