I tried to send XRP to one of the gambling sites I'm using, but I was prompted with this message.

Therefore I'm suggesting everyone especially from the Filipino community who are constantly transacting from coins.ph to a gambling site/s or vice versa. The BSP is already monitoring us, and if we submit the information and put a gambling site as a recipient, we might be sanction as gambling is illegal in our country and it's part of the TOS of the coins.ph that sending coins to a gambling platform is prohibited.
you may refer to the complete terms of services of coins.ph.
https://site.coins.ph/user-agreementProhibited Uses include transactions or activities related to:
(c) Gambling: Online gambling, lotteries, casinos and informal gambling, gaming operations, sports betting, and other games of chance and forms of speculation;
There's nothing new about this as government also with coins.ph implement this prohibition before and many accounts has been banned due to this activities so best not to use this wallet if we want to gamble, we had so many wallet options which is not so strict about this and if we are worried on how to cash out then transfer first your balance then withdraw it there for sure we will be safe for doing this method.