LOL!
When you decide to run for delegate, it is your decision whether to declare whom you support, or run as an unbound delegate.
If you don’t like the person running as an unbound delegate, don’t vote for them.
“Not allowed to know” is nonsense, as it’s the decision of the person running for delegate whether to declare or not.
So, where’s the “scam”?
The scam was not being allowed to vote for a presidential candidate and playing Russian roulette with delegate choices.