Yes, that's true. Fiverr profits from the 20% it charges to its sellers, but it's because of buyers that it is able to do so.
By the way, my situation has been fixed. Today I woke up and my gigs are eligible for promotion again, my gig now appears on the first page of the search results, and I got the early payout option back. I'm glad and thankful it happened, I didn't want to move to another platform.