For almost a year our game was dead, and I mean completely dead. We got like 2-5 downloads per day. We had no marketing budget, no ads, no social media presence, and we declared our game a failure.
Then all of a sudden, about 1 year after we released it, something happened. Google decided to give us some love. Out of nowhere we started getting 100 dls per day, 500 dls per day, 1000 dls per day and it kept growing.
We had no idea why, but before we knew it we had 10k downloads per day ALL ORGANIC!
This really goes to show you that as a indie developer with no budget the play store is mostly RNG, and never give up on your games even though it might feel hopeless, one day you might just blow up for whatever reason.