I know you say "it's only a picture"... I just think it's a bit strange copying other's photos and cropping it to remove some of the name...
I've had photo's I'm very proud of stolen, copyright cropped... I simply don't agree with it.
Your gains. Did you buy the Bot kit, Naza and all from them? If you so, you are allowed to ask them for a recommended setup for a beginner. I'm afraid I have managed to avoid DJI controllers so far so I'm unable to assist with gains... but the retailer can (and should) assist rather than hoping the customer already knows everything.