I just signed that petition, and a couple of others while I was at it.
I couldn’t help but notice the large number of petitions that are leftist causes.
There is, for example, a petition for the president to release all tax returns so that they can be examined for evidence that he violated the emoluments clause. I wonder if the author of that petition even understands what he is asking for? Another petition calls for President Trump to resign on the basis that he is violating the emoluments clause. Do the authors of these petitions have any clue what they are talking about? Are they even aware that the emoluments clause only applies to politicians while in office—so has only been applicable since Jan 20, 2017?
I signed a petition to deidentify college admissions applications to remove any reference to race, and to designate confederate monuments as historical monuments.
In the future, I may place my own petition.
I believe it is just a platform for petitions. The others you mention have different authors. If the platform itself was meant to be conservative, it has been infiltrated. At least they not practicing censorship which sets us apart from the commie goons.