Fractional people don't count
It was more to say that, those still happen. Inlanders with criminality concerns happen too. So, if you take out those three groups, the odds go up as well. Now take the number and put it against the total pool (not just the known pool), and the odds changes again in favour of this group.
Marriage fraud is a big enough problem that, CBSA and inland CIC does perform home inspections.
All that is to say, not to worry. If you're legit, you're essentially a shoe in...
When we consulted an immigration lawyer with what we lerceieved to be red flags, she told us that applying inland was virtually created for cases like ours, and that those things we felt might hurt us would be mitigated. She has 31yrs in immigration law.