Celebrating the Lenten tradition does not eliminate human needs and wants.
So while some entrepreneurs take these as opportunities to benefit financially, in reality, the main beneficiaries are the consuming public especially when many, if not most, people elect to spend time away from work. Life becomes a lot more convenient for the most of us.
Thus I salute entrepreneurs who elect to tradeoff leisure time to open shop when most businesses are closed. This is an example of ethical self-interest which extrapolates into public good.
In the words of investing guru Doug Casey
It's in your selfish best interest to provide the maximum amount of value to the maximum number of people
And the provision of public service through trade is, in effect, loving and servicing one's neighbors, clues of which can be found in the Bible.
From Galatians 5:13-14
For you were called to freedom, brothers. Only do not use your freedom as an opportunity for the flesh, but through love serve one another. For the whole law is fulfilled in one word: “You shall love your neighbor as yourself.”