SIAM and IEEE work in the same way. They sell their (bad) name to dubious conference organizers for some royalties. To accept papers based on a quick review in their abstracts is unacceptable, unethical and quite risky. This is the reason that IEEE and SIAM conferences have accepted so many SCIgen fake papers. So, the book of Abstracts especially of many SIAM conferences is a real festival of fake papers that can be classfied as follows
a) fake papers (like SCIgen or like the paper: "mathematical psychology of insects" that published in SIAM last year) that are submitted intentionally
b) wrong papers from suckers that believed that they discovered a new theory of relativity or they believe that they will correct Einstein's theorems or will resolve the last theorem of Fermat. These are not SCIgen papers, but are papers of suckers. They pay 300-500 USD and then
they cock in their family or in their neighborhood that they have proved the ... Fermat's last theorem.
c) some ideas of some people in their Abstract without any implementation of the main part of their paper. For example: "plantations on the moon or on the Mars", or "on a new medicament for the cancer therapy" and many other "good things" in the Abstract (sounds good) but without any real implementation in the real part of the articles.