I've never stated that was the bait in the photo. The photo was an example of what I meant by stringy leg designs, as the frog in the photo actually have that type of legs. The frog I was speaking of didn't have legs like that. I'm not sure why people thought I was speaking of the frog in the image, when it doesn't fit the frog I was defining in my post.
Like Tatul pointed out, if someone fished with that frog, they'd probably recall it; not stringy legs, and a hard rubber design. It kinda feels like a gum eraser. I don't think there's ever been a frog on the market like it. Just those two combinations narrows the frog down a lot, considering the majority of frogs are either hard body, or hollow plastic, with many of the hollow ones having the whole stringy design.
I haven't thrown one in years. But when I owned one, my frog collection was very limited. I too have been using hollow popper frogs.