Both Dateinasia and Oyoy are being discredited obviously by some indivudual making up highly negative fake reviews under many different fake names, this guy may be have been kicked off the site for his behaviour and can't get over his frustrations.
Both Dateinasia and Oyoy are made by an individual, not a large company and monetized by unintrusive ads. The site is very safe and they're actively after scammers and fake profiles for the users safety. If someone get's kicked of it has a reason eg. False signup, bypassing country IP blocks, stolen photo's and blacklisted persons etc.
Long time user of both sites here never had any issue, always got quick email feedback and found many close friends via the site. I don't know a better datingsite that's both safe, free and without issues.