All arguments don't make sense. There was no secret nor was there any bank there. Central banks are not banks per se. They are monetary boards that regulate how money works and is being used in the country. There was no statement in the news nor in mine that says that we are dealing with commercial banks.
Bottom line is that the government in the Philippines did not regulate bitcoins that would be advantageous nor disadvantageous to it. The fact is that they only are regulating exchanges so that they will not be used for money laundering or terrorist financing. Nothing more. The BSP is not dealing in crypto or bitcoins!
They don't see the need to regulate it now, maybe they believe the exposure is just to small to regulate but you are right they regulated the exchanges and in fact they already issued license to some who applied. When they regulate, they are bound to follow the rules and they need to do reportorial requirements to the bank, that report should include compliance on the AMLC because money laundering is rampant using cryptocurrency.
@Luan, yes you're correct, these statements from central banks in our region (I'm from Malaysia) are pretty much only worth lip service. My country and Indonesia have regularly come out with opposite statements saying that they don't recognise Bitcoin as payments, but the nett effect is close to zero in terms of actualy volume. Southeast Asian trading is still very low globally, but they have been climbing and if they keep at the same rate for a year or two more - which they surely will, they may very well become significant minorities in the global market.
Nevertheless, a lot of people will see this as positive. Now on the point of regulating exchanges, I believe coins.ph and Luno (active in all three countries I mentioned) have been several months in talks with central bank reps from all three. If nothing more, it merely legitimises their business of trading Bitcoin. Won't have affect on price, but definitely adoption.