Between the demand to install an app we are prohibited from even "decipher"ing and the theft of content, I don’t think this service is anything I want to be a part of. I thought they were trying to be something better.
The contract language that informed my opinion follows.
When you post Contributions, you grant us a license (including use of your name, trademarks, and logos): By posting any Contributions, you grant us an unrestricted, unlimited, irrevocable, perpetual, non-exclusive, transferable, royalty-free, fully-paid, worldwide right, and license to: use, copy, reproduce, distribute, sell, resell, publish, broadcast, retitle, store, publicly perform, publicly display, reformat, translate, excerpt (in whole or in part), and exploit your Contributions (including, without limitation, your image, name, and voice) for any purpose, commercial, advertising, or otherwise, to prepare derivative works of, or incorporate into other works, your Contributions, and to sublicense the licenses granted in this section.
As a user of the Services, you agree not to: Except as permitted by applicable law, decipher, decompile, disassemble, or reverse engineer any of the software comprising or in any way making up a part of the Services.
The campaigns my players consistently voice as their favorites are ones where I created an overarching plot, and then incorporated their backstories as significant and impactful portions of that plot. Being the sole input for character motivations for a story (as with a book) makes it easier to end up with a coherent vision and story, but more difficult because of the amount of content you’re responsible for. Conversely a good DM can offload work to players and end up with a result that everyone is personally invested in.
I will say though that some DMs end up writing thousands of pages over the course of years spent in an ongoing campaign and might cry at your characterization.
It’s definitely POSSIBLE to run a campaign without ever writing a page, but good luck when your characters get attached to an NPC you forgot about if improvisation isn’t your forte.