First of all―thanks for the interest, @CaliforniaPuppy! That’s a really good question, and deserves a bit of a longish answer. It’s funny because I think I’d ask the same in your position really, because stewardship of data is something I personally think about a lot when I use stuff online.
To give some context, this app is my side-project within a small company (just a few of us, really). We’re doing some other semi-related stuff and that is an income stream, currently. As for this app, we haven’t decided on the monetization model yet, as we still don’t know if it’s actually helpful to people. I envision it as free for individual hosts, always, and in any case, no content created now will be subject to any additional requirements down the road. But that’s just my word, so:
Whatever content you create, you’ll be able to take it with you. Admittedly, I haven’t built automated tools for that yet (that would be a ton of work!), but I’ll be happy to manually export whatever content you or anyone else have created, send it to you, and delete it from our servers if you so wish. I personally strongly dislike this model where someone holds peoples’ content hostage and/or uses it as leverage to start asking for money, or abuses their users’ trust in other ways (we see this happen a lot nowadays, unfortunately). We would of course store a copy of your content that you can edit, access and delete at all times, and also we would serve this copy to other people you share your content with. But the rights to it remain fundamentally yours.
I’d definitely like to hear what you think about this. And I’m open to discussion about how to do this and protect the interests of users who create content.
If you have concerns and want to talk more, feel free to send me a direct message and we can chat. I want to do my best to earn your trust so you can take the app for a spin, because I’m pretty sure you’ll like it 
So sorry! I’m not exactly sure what happened―did you try opening the direct link to the app in my first post (https://creator.goroam.city)? Do you remember what the message said exactly? One thing I forgot to mention is that the website is really not usable on phones due to a very small screen space (can’t show the map with a sidebar at all), although it should work in some capacity. So can I please ask you to try opening the app again from a computer? If you encounter any problems or if you want me to give a quick tutorial on how to use it, feel free to send me a private message. Thanks so much for your interest!
