Interesting idea. On another forum the founder said they weigh 20-23 grains. Pretty on par with 3 vanes. I have to imagine these are flexible or brittle. Someone pointed out these are likely a no-go for whisker biscuit shooters. Website will officially launch later this week.
Reminds me of FOBs from a few years back. I shot those and they worked well. They were designed to detach at pass thru. Made finding pass thru arrows about impossible.