.online is one of the many TLDs that charge a dollar for registration but bump the price to $30-$35 for renewal. So far, this seems like a good signal to tell apart serious TLDs and ones just preying on customers who sort by cheapest (or capitalizing on one-off phishing domains).

I had a .fun domain that I was using to host a small project and they pulled that on me, I just let it expire and killed the project.