There are no earnings mining any blake2s coin, a rx 580 will give you this and profit is minus 5 cents of a dollar per card, https://whattomine.com/coins/220-xvg-blake-2s?utf8=%E2%9C%93&hr=1300.0&p=30.0&fee=10.0&cost=0.1&hcost=0.0&commit=Calculate

However the feature is a developer's promise, so regardless how the market is, thanks for the feature, it might be useful in the future when coin prices start rising again.