Scoop does not carry the same risk of voiding auto insurance as traditional ridesharing companies. The simple explanation is that drivers of traditional rideshare companies profit from their trips which can void auto insurance. Scoop drivers get a reimbursement of a portion of the cost of their commute, which the IRS does not consider income as long as it comes in under the stated limit (~$0.535 per mile). Therefore, carpooling with Scoop is legally treated the same way carpooling would be with no app, which does not void traditional auto insurance.
You can see the IRS guidelines on standard mileage rates here.