Since they are doing look ups as volunteers, it is important not to overuse their service. If the owner is making copies of information and sending it to you, be sure to ask how much it will cost, so that you can reimburse the owner for his or her expenses. I am prepared to check the index and supply any entries for 5 Surnames free of charge. If people have a date and surname for an event between 1859 and 1873, I will do a synopsis of the event free of charge. If someone wants a transcription, the cost will have to be negotiated.
Some articles can be quite long.
I will respond on email.