I haven’t seen leather cuffs used much in the recent updates. There’s been lots of rope, lots of modern-style handcuffs, a fair amount of other metal restraints, and a few duct-tape sets, but the leather cuffs have been missing.
Maybe it’s because the current set of RE leather cuffs don’t look very good. I think I’ve mentioned before that they manage to look both twee and overly-fetishy at the same time. So they don’t get used much, and aren’t as popular when they are used.
So my suggestion here is to invest in a good – and good-looking – set of leather cuffs, and to do multiple photosets with them.