93% is a great number! I’ve completed over 2,200 gigs, and my ratio is 73%. I suspect many longtime sellers have numbers that are fairly similar. There’s always going to be a certain number of buyers who won’t leave ratings (even if they’re happy with what you delivered).
When orders are marked “Complete” automatically and no rating was left, I will often message buyers (if they’re new buyers and not someone I’ve worked with before) and say “Hi, a recent order of yours was marked Complete… I wanted to be sure you loved it since I didn’t see any rating. I’m always striving for 5-star quality and excellent customer service. If you need anything else, let me know! Thanks! :)”
This way, I’m not pestering them or saying “Hey! Please leave a review!”…I’m following up on the order to make sure they were happy with it. Many times, the buyer simply forgot to leave a rating, and will go back and do so right away. (They’ll often send a message back, saying “Hey, sorry, I forgot to review! Great work! Thank you!” or something like that.)
But again, no matter what you do, you’re not going to have 100% rated orders. So don’t worry about it too much. Provide great service, communicate with your buyers professionally, and you’ll get good ratings and overall numbers. That’s all you can control.