I saw this advertised on my local baitshop's website. Anybody ever used 'em? What exactly are they for and what are the advantages?

RI's hook is made by Gamakatsu.  A bigger gap than most straight shank hooks and extra strong for flipping with heavy line.

Super sharp as well.

Brad

I trust Reaction Innovations. I think they are a quality company.

But based on the description by Brad, the owner riggin hook may also suit your needs.  They work well with stubby soft plastics like fat ika's