Complex sentence: This brought about the "Microsoft Supported by Dead People" controversy from Microsoft's and CAGW's opponents and the CAGW's response that they were not tied to Microsoft or to ATL despite Microsoft having donated money to CAGW.
Split into simpler sentences: This brought about the "Microsoft Supported by Dead People" controversy from Microsoft's and CAGW's opponents. The CAGW said that they were not tied to Microsoft or to ATL, although Microsoft has donated money to CAGW.