So, PlayTest Cloud is a legal app and site where you can earn money just by testing apps. You will receive reasonable money from the site, but you will have to take care of some aspects of the operation of the site.
I found this website off a tiktok and decided to sign up after I did it took them around 2-3 weeks to send me a playtest they could pay me for. After the playtest was completed they didn't even pay me, the community manager who responds to emails was also out of the office most of the time so it was a computer who was telling me to write another email later in the day. DO NOT RECOMMEND