Mmmmmaybe.
A lot of what they paywall depends on if the server runner's account is a Plexpass holder. You might have to pay a one time fee for the app depending on what platform you choose.
Then again, there's different ways of sharing your server, they might be keen on only including Plexpass for the Plex Home users and then paywall the E-mail shared users.
Mostly the right-wing leaning Americans, who don't like anything that costs them money even if it contributes towards a better society. They say they hate Socialism in all its forms, but had absolutely no problem accepting stimulus handouts. They are the pure leeches of our country.
Left-wing leaning Americans tend to believe science even if it comes as a slight inconvenience to themselves, that includes things that sometimes cost them money.
Historically, that's how they usually rolled out features requiring a Plexpass - It usually depended on the server owner owning Plexpass. This move, however, makes me think they'll probably change that for shared to others via E-mail.