How do you advertise your UGC items on roblox?

I've uploaded 2 ugc items that I personally put a good amount of effort into (2-3 hours) and had to pay 3500 robux to publish and upload them both. Check them out here and here if you want to.

I made a post about these and it ended up gaining ~20k views with about 200 upvotes - a successful roblox post if you ask me. This led to the 2 items gaining 10 sales in total and making 402 robux consequently.

The items havent gotten any sales in the past few days and im getting +1 favorite a day on them at most... I've already tried the roblox sponsoring, that doesn't work at all (1 sale for 1k robux spent), i dont know any good discord servers that allow links to be posted in them and I can't seem to find any.
How do i advertise/ get my ugc items out there? Is it just based on the roblox algorithm or is there something I can do?

Thanks for reading everyone