I'm not entirely familiar with this field but I took a look at there website and some other stuff online. It seems like they are a middle man between the viewers paying on the platform you stream on and you getting the payment. I've heard some pretty awful things about companies like that, so I would definitely be wary. I looked through their privacy policy and here's what they claim to "generally" collect.
- Full name;
- CPF;
- Date of birth;
- E-mail;
- Phone/mobile;
- Payment information.
Most of that seems fairly reasonable, it doesn't seem too excessive. I'm not sure what a CPF is but it seems to be a Brazilian thing. According to one user on reddit it's an identification thing similar to social security but not nearly as harmful if someone gets a hold of it. Supposedly the worst they could do is sign you up for a political party or something.
I also looked at there github page and it's definitely closed source, and only 7 people follow the repository so either not many people work on it or I found the wrong repository.
Again I'm not super familiar with this or the industry of streaming (which I assume is what you are doing based on the description of what the service is), but from what I've found I would recommend that you try to find something else that can offer what you're looking for, preferably open source, and if that doesn't exist then this seems like it might not be a terrible option.
If you do go with this I would recommend going through their privacy policy more thoroughly than I did, and also after you use it for a while request a copy of your data. If you discover that you don't like how much they have on you then stop using them and look for something else.
Hope that helps