Actually al MPO's are different. But most do provide some services after the victim is found whether they are safe or sadly deceased. There are services that can be provided for victims or survivors. But in the overall scheme of things there "job" is done so to speak. They do offer some initial guidance for a period of time and refer them to the services available but honestly there really is a lot of times a bond there between the person that worked the case & the families. But again- there are all different, just saying what I have seen from what I have been involved in.
Just an example, an MPO that I have volunteered for worked with a family that had a teenager that was missing, it was a case that was taken, when LE was agreeable, searchers were brought in along with LE, along with other services as well, teen was located a few days later, (sadly deceased), but other things were done as well. A vigil was set up, connected to victims assistance programs since the teen was a victim of violence & her state offers that, etc. Not to mention that each case in itself is different.
Yes they do usually rely on donations as well, but no not always from the people that they represent, at least not the MPO I have worked with, it is not for profit & not funds are expected. If you can't donate, you should still be able to have the same services given to you as anyone else & have your loved one searched for.
I hope some of this makes sense, sorry for the overly wordy post.
Please let me add-not all MPO's are like LnM. NOT AT ALL. I know I have said this before & am beating a deadhorse- but it is how I have learned & have seen & what I myself believe. THE VICTIM COMES FIRST, and then their family(and usually those that aren't guilty totally back your efforts), and anything else after that.