Help/ How to improve / Banned or not

Hello... Well I’ll make this short/ The thing is I know this friend who has a main website but along with this he has like 50 more one page sites under a different url’s relating to that main websites description/ this might be know as domain spam however regardless of how he is going about it he isn’t in like number 2 on Google.
I want to know if whether what he is doing is right and how to improve it/go about a different approach. Another thing how can I found out if he has been banned by search engines. Any response ASP would be great THANKS GUYS/GALS.

Your friend needs to get focused...IMO.

Stick with one main website, and if all these other domains with one-pagers are related, make each of them an individual page within the main webiste - expand the one site and dump the others.

Really, if they're all related to a common topic, what's the point of having 50 or so other domains with one page each - none of them will ever rank well on their own.

...and if they're all hosted together, and the engines determine they all belong to the same person, everything will be deemed garbage and never do anything organically...