You are not the only one who has tried to understand the Fiverr Algorithm.
It is a secret that Fiverr does not share. However, I do know that there is a constant moving of our gigs. For example, I could check your placement right now and find it in a different place than 5 others who bothered to look for it. A group of my Fiverr Forum friends tried that experiment once, and we found each others’ gigs in very different places.
I would say none of the above. Fiverr gives everyone a chance to be on the search’s earlier pages, whether they are new or experienced sellers.
I think what counts more is how well your gig is performing, how many sales you have per week and if you have cancelled orders or not.
Also, you may want to read this thread for further information.