You're supposed to get 2K FM for just completing it and some EXP on top of that. For instance, if you never touched a character and did their Character Story and Easy Survival you'd get a total of 16k. 2K for the story, 2K for Easy Survival, and 12 levels worth of XP that each award 1k so 12k. 12k + 2k + 2k.
Maybe it's bugged or they changed it yet no one noticed it until now. However, it's well documented that it did give 2K FM at one point.
People can test tonight with Abigail. My guess is maybe a bug is preventing a message notifying you of the FM bonus or maybe it's just not giving you the FM. I only assume that it could be a bug because, weirdly, every Trial Vol. 2 but Ryu gave me FM. Now I wasn't keeping track so maybe I did receive the FM but the message certainly didn't appear in my history.
You are correct. For some it did give me 2000 according to the message log. Only for the characters that had not reached level 18 before doing survival for some reason though, as mentioned. No message and no FM for those. Quite shitty if this is truly a bug and I'm now missing out on 2000 FM per survival run in some cases...Then again, all my characters are now on the same 18000 FM total gained so it seems like I can't technically be missing any FM (except for Ed and his 500 less)...
As promised I'll report back when I can try again with Abigail, just to be sure it isn't just the messages that are not popping up.
Edit: bought Abigail and did survival on easy with him first this time. He went from level 1 to 8 and has now earned me 10000 FM in the process. The message log mentions him earning 5000 exp, 8000 FM and 2000 FM (along with some color and costume unlocks). The 2000 seem to be for survival going by earlier posts but it does remain strange that I have not gotten that for all characters I completed survival with because it seems to be tied to their levels as well. I'll now do story and demonstrations with Abigail to double check if I'll end up at the usual 18000, in which case my worries have been for naught.
Edit 2: watching the demonstration earned me another 1000 exp for Abigail, making him reach level 9, as well as 1000 + 500 FM. Doing his (awesomely dumb) story made him jump to level 13 and earned me another 6000 FM (divided up into 4x 1000 and 1x 2000). Just like Ed, he is now at 17500 FM and not 18000 like all my other characters but apart from this missing 500, I feel reassured that I'm getting most of the usual FM for doing these modes despite not getting all the messages earlier.
Edit 3: Again, apologies for not posting this in the "earn FM" thread. I only noticed my mistake after doing some follow-up replies...