Can you add an extra conditional?

We add a regular custom meta field and a meta field value to products.
For example, a product might have this key and value

‘buy1get1item’ value ‘1’
‘issaleitem’ ‘value ‘1’

Is it possible that in the next update you can add this as a conditional?
Your plugin works good, but we just want to add this one extra layer to customize it better, so that the coupon works as normal, BUT only if the product has custom meta ‘buy1get1item’ or ‘issaleitem’ present.

If a product does not have those custom meta fields present, or it is set to NULL/0 then this coupon will not works.