I get lots of messages mostly off girls who are of no interest to me..   if the messages are off an attractive girl who meets my criteria who has a voice and an opinion I will write long reply’s with the potential of a meeting and investing time and effort in her

Sadly if man is too busy to give you quality of reply you are not top of his list of priorities 

If I’m busy but interested in a girl I won’t rush a reply. I will wait to long lunch hour or if I wake up in the night to give her the reply she deserves

Sorry that it appears to me this man is just a pretty picture with no positive intent towards you