well i think that reason that they accept you is just they want lot of friends but when they have full time that they read your profile they losses interest actually its hard to answer this question of yours. my answer is only my opinion.it's hard to predict people's mind.. cowboy..

sometimes, it takes you to initiate the friendly conversation so as they come to know your good motive. just to echo what cherry said, there are surely a lot of others who are not like them and always wanted to find a good friend across the world via chatting. just don't be bothered. :)

Hola Chiquita, There are many reasons, one of them could be that when you asked for friendship they were embarrassed to reject it maybe , but were truly not interested in talking to you . It is not a nice attitude but some tend to do so. Just don't bother and look for others ,after all they are "some " not "all":)

same thing happened to me.

Maybe they don't have enough time?