Your charity probably needs a couple of years to acclimatise to any new fundraising channel before it is accepted as ‘business as usual’. There is no way to avoid this ill-feeling and nervousness, but there are ways to expedite this period.
Do the leg-work with all stakeholders by killing them with kindness and knowledge no matter what their initial views on your chosen channel. Volunteers who feel cheated by paid fundraisers working like mercenaries for their dollar need to be wined and dined, listened to and empathised with. Spend the twenty minutes on the phone that they need to feel reassured and their points taken.