It would be helpful to be able to see if people are current members or not.
Probably a good number of the non-repliers are people who no longer have the email address they supplied when they joined.
I agree, it would be good to know if members were current, as here, you can check last log on date etc. If they do not update their current email, it questions if they are really interested in contacts and further info. Some put their tree there, put do not pay for a a sub.
I have let my sub lapse, after a number of years. Initially I found it quite good, but do not use it anymore. If I get any connections from there now, positive or not, I always give a reply. If I/they want to take it further, I pass on my email, then it is up to them.
I have also been in a position, were you do not get any replies to requests, but think of it as their loss, they cannot be that interested anyway, or do not want to help or share, which is the foundation of FH.
Cas