$99.99 which comes out to about 6 years of paying the yearly fee. I paid $5 for Sync back in 2014 and I got 9 years of free updates and no ads until reddit killed sync.

If you're planning to use Lemmy for at least six years, the $100 is a steal, especially since I feel we can reasonably expect the same level of quality of life improvements and updates that Sync got with Reddit.