What means the limit of "10 payment submissions" on a Bronze plan?

So, I just need to clarify that when it says the number of payments on a plan, that is actually the number per month?  So, I will only be able to accept 10 total payments per month on the 1st plan?

Yes, you are right. Your form will be disabled when you reach the limit of 10 payment submissions on a Bronze Plan. 

The good thing about it is that this counter resets monthly, so on the first day of next month you'll be able to receive payments again. 

Note that this limit is 100 on a Silver Plan.

Let us know if you have more questions.