Another quote from the Guardian piece:
"
Sky unexpectedly announced the ending of their sponsorship last autumn and many believed it would be impossible to find a suitably wealthy backer to enable the team to continue. Recent and extensive negative coverage of Brailsford and of the team, in the aftermath of stinging criticism from Ukad and
the DCMS after the infamous “Jiffy Bag” investigation, was followed by the ongoing farce of the Dr Richard Freeman medical tribunal into testosterone use, which was
adjourned a fortnight ago.
Those factors, allied to a tight timescale and an increasingly fraught sponsorship market within cycling, all appeared to be working against Brailsford."
The answer was: find a sponsor with even worse ethics than you.