Many items would be abandoned if casinos chose physical gifts in all situations. The stress involved in trying to get items cleared in customs is not worth the stress for most persons in some countries, especially when it is just an item and not items to sell, where you can consider that there will be profit to be made.
Customs in some countries will make the clearance process particularly frustrating for a first-timer with no experience in the process. Sometimes the intention is to get them to abandon the items so they can auction them for themselves after a while.
I believe if a rough survey is conducted, many gamblers will prefer any gift from the crypto casino they play on to be given to them in the form of cryptocurrency. There is a lot of ease.
You are absolutely right. Shouldn't customs control know the value of the parcel? This way, the sender is unlikely to show that their goods are some kind of trinket. This way, both those who send and those who receive them are interested, I mean the country. Some countries have quite strict customs, and there is a risk that the parcel will either not arrive or the duties will be so expensive that it will simply not be profitable for the recipient to pay it. I am telling you my example, about sending an iPhone to my country; after some innovations, expensive gifts became too expensive for the recipient.