This is a genuinely sensitive topic, Primorge.

I port a lot of free props and scenes / stages from eg MMD PMX format, but must always check that they're not 'TDA Origin'. This is because that prolific artist, who'd produced a wide range of freebies, was justifiably outraged to find his freebies being sold on 'Second Life' without credit or attribution. As SL seemed unwilling to take action, he changed his freebies etc 'T&Cs' to 'No Port'. No exceptions, no waivers, no ports...

As rigged PMX figures remain beyond my skill to re-rig, I just had to check the origin of props and clothes before porting.

Clothes ?? Yes, as a PMX set ported to OBJ+MTL may not fit any Poser figure, but looks good on a wardrobe or shop hanger. And usually low-poly...

And, now, a twist: I've found a commercial, stand-alone utility which claims to convert rigged PMX figures to rigged FBX. The Windows app is not $_budget, but discussion with supplier allows for 'uninstall+refund' if FBX format incompatible with Poser.

Seasonal expenses / contingencies have put this on hold until mid-January, when I'll have the money and time to try it...

If it works, I'll suggest to supplier that they consider advertising it on Rendo-- With reminder to respect source 'T&Cs'...