No, there are no restrictions. However, invoices exceeding EUR 10,000 may be subject to an additional check and an invitation to explain the nature of the transaction and the origin of the money in accordance with AML requirements.
Frequency of payouts - as much as necessary, there is no limit. In cases where there are many small invoices, we do not recommend opting for automatic payment for each invoice, but to group them into a larger payment request, as you have to account for the bank's commission fee for each payout request.