The website looks like it was developed in the early 90s. Every link opens to a new tab/page on the same website. Every advert that is "sponsored" links to a product on the same website.
All of the games are listed as in development, none appear complete.
They also offer floor cleaning through the same website.
I will do it anyways. I don't think it is paid, they would have noted it. That being said I wouldn't download any of the games on the website if I were you :)