I'm so glad that when I applied for my first job 10 years ago, having no experience in any field, applications through websites and apps wasn't really a big thing and it was mostly done by sending e-mails. Gathered a list of 200 emails and sent those emails one by one, got a call two days later and then kept getting more calls with offers for the next half a year. I do remember registering to a couple big company websites to apply there - and just like the OP mentions, those instantly became ghost accounts :)