It can be challenging when your gigs experience a decline in visibility and sales after a level upgrade. Fiverr may indeed prioritize promoting other sellers who are still working towards reaching their threshold.
To overcome this situation, consider focusing on improving the quality of your gigs, optimizing keywords and tags, and actively promoting your services through social media or other channels. Building a strong portfolio, obtaining positive reviews, and delivering exceptional customer service can also help attract more exposure and sales.
Stay persistent and continue to provide high-quality services, and over time, you may regain visibility and see an increase in sales. Remember, success on Fiverr takes time and effort, but with dedication and perseverance, you can achieve your goals.