I got a message from a guy who claims to be Narupajin (ナルパジン) and "rights holder for the Tda-style MMD model".
Hello. I am Narupajin, acting as a rights holder for the Tda-style MMD model.
Tda formula prohibits the use in sexual contents such as R18.
Please delete the posted video or pay the license fee.
We are preparing a special license as the demand is increasing.
If you wish to continue using the Tda MMD model to create sexual content, please transfer the license fee (0.1 BTC) to the address below. We accept only with bitcoin.
I have some doubt on his words:
First, as far as I know, the author of TDA-style model should be a guy called Tda instead of Narupajin.
Second, if a guy called Narupajin is really "act as rights holder for the Tda-style MMD model", he should prove he IS that Narupajin INSTEAD OF someone different with a same ID.
Third, why a Japanese ask fee as BTC ONLY? Refusing USD and even JPY? If you want to make your potential fraud untraceable I suggest you ask for Monero or ZCash. This is a suggestion from a FUK'IN NOOB of Intenet ANTI-TRACING.
Finally, 0.1BTC, you may earn money much more faster by WannaCry rather than asking on this site.