I think everyone is overcomplicating this. Weddings mean nothing to people other than being a party and the woman is princess for a day. There is no religious significance to them. They do a destination wedding to have fun. They can’t even get married outside the country legally so they get married in the US in the courthouse to then go play pretend wedding in some vacation spot. And they don’t want everyone there. Hence the lack of invitations. But they still want the party. So they do the “reception” back in the states and invite all potential gift givers. It’s about them having fun and satisfying the woman’s demands. That’s it.