I don't like revealing my identity so I haven't been able to play around with coercion techniques that can get deeper and deeper like blackmail. But I still love coercion. I have SOME ideas for alternatives, but I would love to get some more. Basically anything that would make you feel dependent on your dom/bully. Or anything that makes you feel like they have some "or else" control over you.

Other ideas:

• Maybe something to do with hypnosis
• A shock collar that gets locked on
• An internet controlled lock box
• An internet controlled chastity of some kind.
• Parental controls on a cellphone (with limits and privacy considerations for safety)
  • Being able to see what you're up to so they can nag you about misbehaving
  • Blocking apps or websites
  • Other phone things you could do. Info to get, features to control, etc.
• "Temporarily effective" blackmail. Maybe you know which hotel room and number they are staying at for example.
• A "safety" deposit? Maybe some amount you're willing to lose if things go wrong, but you really don't want to lose it. Seems really close to another kink which I will not name though because I hate it, and a lot of places make it against the rules.
• A dom controlled self destruct button. Maybe important computer files are erased or locked away somehow.
• Forced/required aphrodisiacs
• Chastity/denial

Ideas I'd try in a RP/Fantasy scene:

• Actual blackmail (in roleplay only)
• Physical addictions of some kind
• "Legally" binding contract for some related/unrelated thing, but basically it means the dom could screw you at any time they suddenly decide they want to do it.
• Magic contracts. Magic spells. Magic. Lust curses. All that fun stuff.
• Body/Mind controlling chip implants (sci-fi)
• 24/7 augmented reality goggles.
• AI/Machines going haywire and suddenly picking and choosing their own changes to make to their programming and suddenly you are at the mercy of some machine that learns what turns you on more and more and you are at their mercy