Shouldnt there be a way to tell if the Frozen Synapse Bundle comes with Humble Frozenbyte?

Do you really think that people who are giving these away bought it for 5 dollars?

There is no way to check unless someone uses the gift URL, but if I recall, you will not see the dollar amount the submitter paid for the bundle.

Perhaps there could be two items in the list of gifts to choose:

Frozen Synapse Bundle - 1P
Frozen Synapse with Frozen Byte Bundle - 5P

Honestly... the creator of the giveaway SHOULD be stating whether or not it has it in the giveaway description.

If the giveaway it's about Frozen Synapse Bundles, why it should have the frozenbyte?

In any case, if it comes with it, ok. If not, ok too

Humble Bundles should just be removed altogether. Most of the ones being submitted were probably bought for $0.01 each anyway.

If you get a gift that breaks the rules: redeem it, then report giveaway.
If the gift also mismatches the giveaway title (like a Dirt 1 giveaway that is actually a Dirt 3 key, or a spacechem giveaway that is actually a HFSB), you may also mark the gift as not received.