[kragen]

presumably melony already knew that because ngspice is mostly licensed under a 3-clause bsd license which says

> Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

unless you're violating the ngspice license? or the documentation and/or other materials are just hard to find?

parts of ngspice are also licensed under gplv2, cc-by-sa-4.0, lgpl-2.1+, or gpl2+, but maybe you aren't using those parts

[melony]

Melony is not that pedantic and melony does not ask questions whose answers melony already know. Melony has better things to do than to hound SaaS services over alleged license violations (unlike a certain somebody).

[kragen]

perhaps if melony didn't know that, it is evidence that the required credit is, in effect, not being given; that the authors of this software are, in effect, passing off the work of the ngspice contributors as their own