Do you find it's worth it to apply to a post if the client is already interviewing?
For me, once a client has reached out to me, they hire me 99% of the time (and sometimes they just offer me the job without even discussing it further, which I think is weird, but ok)
Do other freelancer experience this?
I never apply for a job if there is an interview with another freelancer. (because of a bad experience in past) I also stop interviewing with a client if she starts interviewing other freelancers while we accept working together.
For me, a client will work with the first freelancer she interviews. Because she read all the proposals and chose the best. So, I won't apply for these jobs.
Well I don't really propose on a project unless I think that I can do it better than anyone else so, with that kind of ego, it is not surprising I pay no attention to if they have already interviewed someone. Whoever, they have interviewed is clearly not the best candidate because they haven't interviewed me yet.
This is a bit tongue in cheek but the honest reality is I don't pay much attention to it. I see something I like, I go after it.
I think it depends on the type of job and your skills. I bid on jobs where the client is already interviewing only if I am reasonably confident that I am better qualified than whomever he/she may be talking to.