I'm looking for this exact thing - did Marketo support provide any insights?
I need answer to the exact same question. Please help! The strange thing is that the salesforce profile that is using MSI has no access to these objects, but MSI seems to be working fine for the users in that profile.
Best Bets View - read
Best Bets View Detail - no access
BestBetsCache - no access
EmailActivityCache - no access
GetMethodArgu - no access
GroupedWebActivityCache - no access
InterestingMomentsCache - no access
Marketo Sales Insight Config - no access
ScoringCache - no access
Value - no access
WebActivityCache - no access