@VivaBean

That's right, you have 6 interactions every 24 hours! However, there are two types of interactions that you can spend it on: the Pixpet Lottery, and egg interactions.

You probably already know how to play the Pixpet Lottery, which appears as a "Play Lottery" button on other users' profiles when they have an available pet (not on a hoard). But for egg interactions, a button will appear next to an egg that someone has placed in their house. Clicking it will give you pumpkin seeds of a random color, grade, and quantity, and it helps the egg hatch faster.

I hope that answers your question! If not I'm happy to answer anything else. ^^