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;