Ada has been denounced by a group of students. The main reasons are related to irregularities with the instructors, payments, and abusive clauses. You can find more information by following this twitter account: @estafAdas.
Since this is a community curated repository (or intended to) it is not an individual decision to remove the bootcamp from the index. Anyway, as a curator, I find it necessary to warn people about this situation and strongly recommend to investigate further before getting into it.