You all know how difficult it is for a new seller to get noticed on fiverr. It is no different for me. So, I keep a constant watch on the buyer requests. If Its anything I can do, I contact them. But, I have observed that only 1 in 30 people replies back to you.
There may be two reasons for it -
1.Their job is already completed.
2.They did not see the message.
So I request fiverr to remove requests of buyers automatically once their job is done through someone. Or even if it isnt, expire it in say 3 days.
And another thing is installing read receipts. So atleast the seller knows that his message reached to the buyer.
I hope my suggestions get noticed.