Best advice from myself and my experiences, meet the person, as soon as possible if you are interested in them. I agree with you they don't make an effort. Much. Some guys would just message me for a month, and then when I said "lets meet for coffee", they were done talking to me. One guy even admitted after I agreed to meet him, that he was on there "mainly for entertainment purposes", so that's why I didn't waste time messaging back and forth anymore. Best wishes.