If you have a 100%/God Alottavisits, then use a corruption crystal on it and get C3 the SPA does not become 7.5%
This is definitely a bug because SPA has a negative and I'm pretty sure C3 adds a % by positives
I had -5% SPA, then made my alottavisits C3 and the SPA is at -2.5%
(by logical math if I had a 2.5% SPA it should go up to -3.7)
In which case it just made my SPA -2.5% from 5%
The image shows I obtained a 49% C3, yet it made my SPA higher, not lower sadly.
This might be a severe issue if AV plans on adding any negatives to familiars and using corruption 3 on said familiar