In general i would agree with both NLNIco and Dean.
First of all: "scams with the meaning of centralized online cryptocurrency casinos", i really wanted to stop reading after this, since this makes the whole article less serious and less valid.
As dean said, there has been many sites in the past that had returned quite an amount of bitcoins, thus making them trusted in the community.
Secondly the licensing part. I wouldnt really agree that all licensed sites are scams. For example having a legal entity(company) licensed in i.e curacao, you can justiy your site's income and pay the proper taxes, integrate more slotgames ( since some providers require mainstream license ) etc.
Does this mean that the Casino cant cheat? No.
Does this mean that the Casino cant do money laundering ? No. ( Anyway money laundering is an old friend of Landbased casino since the old times
, so nothing new. )
Does a licensed casino provide more protection for the player ? Not in the bitcoin gambling world. In fiat casinos with i.e Maltese licenses, maybe. Its just that the user "wants" to believe that bitcoin licensed casinos are more "legal" and "safe".
About Costa Rica, some can of course make an offshore company there and operate online gambling site. His company will be legal and will be operating from a legal jurisdiction. Of course the Costa Rica "license" is not a license, since there are no licensing laws in costa rica for online gambling.
Plus we must not forget that all the "Licensing" laws in different countries are made to protect the gambler from frauds and scams. If the player wants to accept that, in the bitcoin world, which most player do, then the liability is to the user.
Anyway, i find the article a bit prejudiced, but thats because the author maybe was the guy who invested in 9 casinos and lost his money?
Lets hope not!