For Reddit: 8 comments – if the thread is new or posted in the last 24 hours. 4 comments – if the thread is older than one day.
For Voat: 3 comments
For Snapzu and TopTopic: 2 comments
For Quora: 3 answers and 6 comments per question
When you order more than the limit, you’ll receive the surplus as credit that can be used in future orders.