DO IT doesn't have a lot of swing jig molds, or jigs that use the offset jig hooks, but they do exist and I think we'll see more of them. Plus other molds can be modified for a swing hook, and offset worm hooks can be used.
Several lure companies are offering jigs like that now.
I can't say why they're not as popular as a jig with a standard straight shank style jig hook, other than the majority of folks are not easily swayed to try new ideas, particularly if it's different than what they've been using for a long time.
I've noticed that many of these newer ideas come from Japan and they always seem to be trying different approaches, which IMO is good. It just takes awhile sometime for American anglers to try them.
As for cons, the only one that I can think of is there's an added cost to making swing style jigs, since additional components are necessary. There certainly are a lot more standard style jig hooks to choose from than the offset style.
I've read comments where folks claim that a swing style jig is easier for a fish to throw by shaking it's head, because the weight can move, and opposite arguments, and I don't know if which is true or not. That's said of long shank hooks, that they provide leverage for the fish to more easily toss the hook, but even long shank hooks have there place where they provide pros, such as on spinnerbaits.
You can add offset hooks to the ear ball jigs and that's not a lot different to use than a Carolina/Texas style rig. We also now have other "rigs" where a weight is attached to an offset hook, but they're not really considered as a jig. That's such as Jika/Gika rigs.
I have the molds that take the offset jig hooks and I like them a lot.
I suspect we'll see more of them.
