This is likely to reduce conflict during transitions -- periods that are often associated with high levels of stress and strain on relationships.
When looking at an online profile, look for those shared activities that both you and your date enjoy, that may not cost much but allow for interaction and conversation.
Even if you find out you are not compatible, at least you will have spent the time doing something you enjoy.
I think they would be an economic gain as they may have more disposable income, since they are not in a family situation.
Should local authorities work to make cities more attractive to singles? Attracting singles could potentially revitalize/stimulate a city's economy.
The dating apps are largely for people who are looking for short-term hookups.