Yo Bitbucket is just deleting Mercurial repositories by June 2020 -- they've given no reason why they aren't make mercurial repositories read-only. Deleting them wholesale seems so unnecessary and hostile.
ICYMI: https://bitbucket.org/blog/sunsetting-mercurial-support-in-bitbucket
@vickysteeves I think I remember hearing @sir has a script to migrate from bitbucket to sr.ht (who also has mercurial support)
@adasauce @vickysteeves https://hg.sr.ht/~sircmpwn/invertbucket