...If I ride a bike without chain I'll get arrested
I'm not surprised if that's true given the direction that real freedom is headed in this world, but do you realize how ridiculous that sounds? I guess that means stand up kick scooters or skateboards are illegal, since they have no chains. Do you get sent to the guillotine if you break a traffic law that serves a useful purpose like running a stop sign or red light?
On a serious note, you do realize that the things that give HubMonster it's extreme efficiency compared to typical ebike hubbies also give it incredible power potential? Each half of HubMonster has significantly lower resistance than a Cromotor, MXUS, or Crystalyte motor, so each half can handle more current. No load current is far lower too, even at much higher rpm, so it's useful at higher voltage and speed. That's why at more than double the current and higher voltage, HubMonster takes all that power and keeps smiling and asking for more while at the same time still converting a higher % of it to power at the wheel.
It's designed for use on 200kg+ scooters capable of highway speeds, upon which people in Asia living in flattish areas pile whole families aboard. Our much lighter loads of custom builds gives us the ability to turn current levels much higher than the factory uses for staggering performance. It's simply too much power potential to even consider bolting directly onto a bicycle frame.
The motor itself prevents that anyway. It's 25mm axle with 15.5mm at the flats won't fit any bicycle dropouts. That's good, because it would probably rip them out anyway. For a build as bike-like as possible to take best advantage of a high power-to-weight ratio, it deserves a custom build, and things like attaching a pedal chain are an insignificant matter for a custom builder. At a price point comparable to hubmotors capable of less than half the power and much lower efficiency on their best day, it's not reasonable to expect HubMonster to be served on a silver platter.
I tried my hand at custom frames specifically for this motor, but I wasn't comfortable enough with the result to sell to 3rd parties. I'm trying a different route now by starting with a frame from an experienced manufacturer. I'll handle the different swingarm variations for both hubmotor use for street riding, along with a high power mid-drive for off-road. I've got motorcycle guys itching to do rigorous testing. The emphasis will be on strength and durability, so customers can expect more than any ebike short of a full blown motorcycle, but priced closer to the mass produced ebike end of the scale. How you guys meet European regs will be your issue to handle, but there will be pedal variants, just in a kit form, not a stand alone motor unless you want to pay for custom work.