I might fail to figure out how job-finding apps and HRs work.

Since I switched to the new job-finding app, I sent out about 500 applications in the past 2 weeks. Most of them get rejected or get ignored. That's fine, considering I am still a fresh man despite I already graduated a year ago. Normally they require at least 1 year of working experience, and most of them are asking for 3 years of experience while only paying less than 2K USD per month before tax. (Well, I still don't know how you are going to find your first job if everyone is requiring some previous experience)

But still, some HR does reply to me saying they're interested in me and ask when I have time to have a detailed chat. Which makes me believe that the previous experience is not a must-have, people are not machines, they can learn, and I can learn.

However, this is the weirdest part. Once I replied to them*, they just start to ignore me. I can see they are online, my replies are delivered, but they don't read it, and they don't respond to me. Where did their "interest" go?

*: I replied to let them know that, for online discussion, I'm ok whenever they're ready; for offline discussion, afternoon is preferred. I don't think this kind of reply will end the conversation.