Thank you, exactly this^

There are stories of these SIM farms all the time, here is an example with very similar gear: https://www.vice.com/en/article/video-ukraine-busts-alleged-...

These stories are always sensationalized when their primary purpose by enlarge is probably just spam.

The gear for those interested seems to be this: https://ejointech.shop/products/ejointech-4g-16-port-gsm-voi...