Hi,
I know I'm a bit late on the reply for this one, but I understand where the confusion might come from.
For reposting an ad to the top, they have 2 (paid-for) options:
• "normal" auto-repost. Pushges the ad to the top twice a day
• "multi" repost. This is what they call the "manual" way in some parts of their site. On top of the 2 daily "pushes", you can MANUALLY push your ad to the top, as frequently as every 15 minutes
So yes, it is paid-for, but tbh, being at the top of results every 15 minutes is well worth it. Even better than "VIP" which gets swamped under the masses of other VIP ads and don't get your ad any better visibility than most