Hi!
First, they removed account delete option.
Here is a link to saved page as PDF:
https://we.tl/t-W5L6ADbmql
Second, they removed free breach checks:
Link to GitHub
Third, they removed free send feature:
Link to GitHub
But (!) allowed sending in trial period so this will not stop abuse because abuser will simply create new account.
You could try Firefox relay or addy.io.
Edit just remembered that one of my favorite throwaway email sites is tmail.link all it is is pure HTML with minimal CSS and doesn’t even need JavaScript to work. Sounds like it’s made by someone affiliated with Njalla.
+1 for addy . io, been using it for a while now and it’s nice to have unlimited aliases for free