Which of the following would NOT affect credit consumption in ArcGIS Online?

Creating map layers with minimal data would not affect credit consumption in ArcGIS Online because credits are primarily consumed based on services and features that utilize Esri's infrastructure, such as storage or operational activities. When you create a map layer, the volume of data loaded does not directly relate to credit usage unless those layers demand high storage capacity or involve complex processing tasks.

On the other hand, using premium basemaps incurs credits since these maps come with additional costs due to their specialized nature. Sharing content with non-members may impact credit consumption as it can increase data access and usage beyond the regular member access limits. Accessing web tools often uses credits as these tools process requests through Esri's servers, which typically requires credit consumption for their operation. Therefore, option C stands out as the one that does not inherently involve credit usage.