Had 2 return, 34 coins, all in the first day. Since then none have returned. Under the old system I was getting 100 per day plus 5000 dust. It really is illogical to me that I'm hoping someone takes my gyms otherwise I get nothing.
But I'm also not sure what you even need the coins for anymore. I used to buy incubators hoping for the chansey/snorlax/larvitar/dratini hatches, but there really isn't a need for more Blissey/Snorlax under this system and if you already have a couple of good Ttars and Dnites there really isn't a need for that either.
Really trying to figure out what Niantic was trying to accomplish with this change, I'm sure quite a few spoofers will lose interest but then again so will a lot of legit players.