From what I understand about the Phillipines, it is a completely corrupt political system and many products sold there are illegal elsewhere. One product that comes to mind is a hot dog sausage that contains very dangerous chemicals that cause cancer which is freely sold in the country but illegal elsewhere. It is quite possible that they sell bikes that are uncertified and wouldn't be allowed in more developed markets like Europe, Japan and the US. It could be a local manufacturer that builds to a very low standard.