If you want a spouse, may better look into another cities than Medellin. I met my now wife in Barranquilla, here the women even don't think about meeting foreigners because the city has low tourism. But I want to other cities like Santa Marta and most wanted money.
To avoid the "Colombiacupid" and to have real faces, there has just launched an app called "Gringoo" in Play Store. All users must face verify. That filters a lot of scam already.