Well, I grace deleted many GoDaddy names never had a problem, but you have to call GoDaddy to grace delete.
GoDaddy registration volume is probably high enough that it will be unlikely that they will run into any issues with any grace delete limit.
So as long as you are just dropping a few names here and there, you should not run into any problems with GoDaddy. But remember, do not just "delete" from your account. You have to call GoDaddy first and then drop the name and they will refund you or issue store credit.