Ok. In my opinion:
1. The UI is unappealing. I would prefer the default theme to be dark.
2. Site layout resembles generic link aggregating sites with no real content, which discourages the viewer from exploring the site further.
3. The boxes with numbers stand out too much among the other content. Thanks to the fact that they take various amount of space depending on the number's length, it causes the entire list of articles to appear unaligned.
4. I was not able to find a link from the main website to the credits link you have posted. Also, it is unclear how much the credits cost. The purchase page is only available once you register and log in. In my opinion that is not transparent at all.
It is also unclear to me why the credits system has been introduced in the first place. The linked page mentions that it is supposed to "limit spam and reward quality contributors". It seems to me that the same goal can be achieved by using upvoting-based reputation system with carefully configured entry barriers that is already in use at many Stack Exchange sites.
In my opinion, the most reasonable way to cover your website's running costs is to ask for donations. But it needs to be done in a very transparent way. For instance, show a chart of real Google Cloud / Amazon AWS bills offset by donations. People need to be 100% sure that when they donate money to "running costs", it would not end up being used for something else like your new iPhone or a vacation in Mexico.
Edit: add line breaks