It is well known that black hats and PBN are blocking all formal seo trackers (especially ahrefs)
Some may also present ahrefs with different content altogether. In such cases it is frequent to have sites ranking in 1st page of google with practically zero back-links reported by ahrefs.
It would be nice when the ahrefs bot gets blocked while crawling from a specific domain multiple times, to have an alternated IP/hostname that will by more dynamic (and not publicly declared) thus not blacklisted, so it would go on and retry the carwl and potentially flag the site as PBN as well.
This would provide tremendous insight when going after for competitive keywords & against blackhats.