Elfsight form - passing a hidden value?

Im not using elfsight, as much as i like it. Its not viable. Not even zapier is. It’s actually really frustrating because everything has limits. Lets say you have 500 jobs, maybe each of the jobs get 50 applicants apply. Or each job gets a few thousand fews. Thats going to eat away at tasks or views really quickly. Even on higher tier plans.

I just dont want to keep forking out for third party plugins as good as they may be, for a jobboard they are not well suited. Well, in the early stages i expect to make a loss, so its not viable at this point. Not for somthing simple like submitting a form.

Im totally stuck to be honest. There has to be a work around that is free. Maybe i could try and build a form with custom code? My javascript knowledge is pretty basic though. Im determined to find a free resolve to this though.