Seems, at least for the trial version, that Nop Sales Campaign does not work in Nop 3.7 when 'bundled' products have a zero dollar value and inherit their price from the value of the bundled items.
"Product skipped. The discount ammount is more or equal to than the product price."
The product is skipped because the initial product price is 0 and therefore there is nothing to discount from the price.
The product attribute price adjustments are not included in the product price and it is not used by the sales campaigns. Could you please suggest your idea in our User Voice portal
, and if people vote for it we will add support for it.
(Not sure if Suggestion promotions are allowed or not.)