What does the "fortune-telling" slot-machine do?

Question

There's this new slot:

What does it do? I've spent some cents only to receive cryptic phrases. The best use I've found for them is blowing them up.

Answer 1

After playing around with the slot in the image, and with the help of the wiki, I've found that, in addition to the cryptic sentences, there are also a lot of useful rewards including:

• trinkets
• Tarot cards
• Playing cards (especially useful the two of diamonds, that doubles your current amount of coins)
• soul hearts
• a Crystal Ball (probably on blowup), a usable item that reveals the map and spawns a random card or a soul heart (thanks @Keaanu!)

Here you can see my results after playing for a while (I failed to make it blow up by itself, so I used a bomb):

It can become a little cluttered, as you can see. I also had 3 more soul hearts and 1 heart container, but I wanted to kill the boss before finishing my experiments.