What are PCIe x1 Slots Used For?

Now im looking for a pcie riser that splits the x16 PCIE slot into 2 times x8 slots Can get this splitter: Supermicro RSC-R2UT-2E8R 2U

Can I use a single iCUE LINK System Hub and hook all of my QX fans into it and the signal splitter so I am only using a single PCIe power cable

pcie slot dimensions Crucial T500 1TB TLC NAND PCIe Gen 4 x4 NVMe Internal SSD · Compatible Intel SocketSlot LGA 1150, 1151, 1155, 1156, 1200, 1700, 2011

pciex1 slot PCIe 1 to 4 Riser Card, Pcie Splitter 1 to 4 PCI Riser PCIe slot split in multiple smaller Any adapters for a x16 PCIe slot split in multiple smaller