Moneypot app like bubblesbit lets you bet less than 1bit(100 satoshi). Their minimum bet is about 1 satoshi/ 0.01bit. I have a question for you OP why would you want to bet with 1satoshi doesn't it feel like a waste of time ?
For many reasons.
For example, when starting out on a new site I like to start low and see if they are legit and see how their live numbers look like before messing with them
The net is full of BS.