I have a really old account (pretty sure I started using it ~2010) and I use lastpass essentially daily. I've never looked at that setting and I see that mine

I have a really old account (pretty sure I started using it ~2010) and I use lastpass essentially daily. I've never looked at that setting and I see that mine is set to 100,100. So it's migrated sometime. But I do also have some vague memory of a lastpass incident years ago where there was a prompt that they wanted to re-encrypt everything preemptively.