Hello, dear Baidu knows that users are landlords. You mean matchmaking agencies or dating websites that make friends through social networks. Of course, this is a necessity and a development trend. Society is too realistic. This is economic interest and material desire, which leads to mutual profit. People's requirements are also increasing day by day, and the material requirements are too high, which leads to the exclusiveness of the deviation between people.

Hello, this is because there are many people in this industry. Where there is more demand, there is a market. If there is a market, it will naturally make money. So the charge is certain. Unless everyone has friends, the software may be free. However, by that time, no one may develop this kind of software. Oh, by the way, people who develop software have to work hard, and others have to earn some money, so profits are obtained from the fees charged.

If you are satisfied with my answer, please accept it. Thank you? Your understanding supports it.