Yeah this is part of the problem.

But even if you had like 10M rows of pricing and then gave a 2% discount to entity A, 3% discount to entity B, 4% discount to C, etc.

You could publish these discount rules.

Or you could just multiply the 10M rows by the number of different entities giving 10*n M rows.

And then let the consumer of the data try to figure out the rules from the output...?