Limitations are mostly protocol specific. For HTTP/HTTPS, you can use all our IP rotation options like random IP rotation, pre-configured IP rotation, Burst IP rotation, client-controlled Specific IP rotation.
For stateless protocols like UDP, client-controlled Specific IP rotation option is not available while the rest can be used automatically.
Basic package IPs, while sufficient for majority of scenarios, might need to be increased if you need to do high number of burst hits in a very short periods of time.