Subdomain CMS or unique URL

[MichaelRyan22]

I own a company for teams Ex  myteams.com . A team registers and they get a site at team1.myteams.com.   Content on each sub team site is mostly unique and I have several back links on each to the main site myteams.com.

I also provide them with a unique URl  team1.com will show team1.myteams.com.

So couple questions

As far as SEO should i be pushing the  team1.com url or team1.myteams.com url?

Is a link from team1.com or team1.myteams.com better for my site, their site or both

How many back links should the sub sites have?

Thanks

[Syed1]

Brand strength is an increasingly important factor, and if you put your content in different sub-domains you will be just spreading thin on your brand strength/ domain authority. If its good quality content you expect, my suggestion to have it on the root domain - perhaps, on a sub folder - as opposed to a sub-domain.