usually people who say they are "masters" at something generally have very little idea about what they are doing. So it wouldnt surprise me if the only thing they were masters of was taking a % for not knowing how to do anything else. Looking at their website pretty much confirms that for me too considering they dont actually provide any information that a model would want to know (like what they intend on doing for the % they are going to take) they are basically selling a service without telling you what the service is, and I would guess thats because they dont even know what the service they are supposed to be providing is.
ETA: Also the copy on the website (and the website itself) seems very low effort, so that's what I would expect from them overall.