Arn't dating websites make money from Users who are single ? If the dating service is just too effective, won't they be reducing their customer base? Where els

Arn't dating websites make money from Users who are single ? If the dating service is just too effective, won't they be reducing their customer base? Where else will you find women in her 30s paying $90 per month for years for a hope to get married vs. someone who pays just for one month and gets married.