What are the legal obligations of "Editorial Board Membership Agreement"? Basically, I have two questions.

First question: Anyone knows EnPress publisher is just a scam/predatory publisher or not? Cause they sent an email to me to invite me to join editorial board of a journal, which is related to my field. But I'm wondering is this a predatory journal, which is called OA-Coating Journal, cause their website looks unprofessional to me besides that there is no any published article in their journal!

Second question: They (EnPress publisher) sent an "Editorial Board Membership Agreement" to me and somewhere in this document they mentioned: "By this agreement, you acknowledge and agree that all ideas and improvements conceived by you in performance of your service shall be the property of the publisher". I don't understand what they're pointing to exactly! Can any describe what's the meaning of this sentence? Which service that would be provided by me will be their property?

Any idea or suggestion is appreciated.
This publisher appears on the updated Beall list. John Baez (a famous mathematical physicist) reported that he got what looks like automatic spam from this publisher: an invitation to get on the editorial board of an architecture(!) journal. It's my understanding that it's very rare to be surprised by an invitation to an editorial board. It's also written in your bio that you are a PhD student; don't get me wrong, but PhD students are not qualified to be on an editorial board, and the fact that they invited you is a red flag. These facts combined would not make me want to touch this publisher with a ten-foot pole.

(There are further questions that you can ask yourself: do you know the current editors of the journals? Are they recognized researchers in their field? Do the publisher's other journals look legitimate to you? Etc.)

As for the legalese they have written - it looks terrible to me. It says that "ideas and improvements conceived by you in performance of your service shall be the property of the publisher". But ideas don't belong to anyone! So this text is just meaningless junk. Even if the publisher is legitimate (which I doubt), they should seriously consider hiring actual lawyers.