Last night - the Tiger team run total was 3.5 against a SP with an ERA over 6 (now 7) - I could not believe it and was wondering what I was missing.
To answer your Q - the streak itself does not affect me, other than ordinary analysis of whether a team is hot or cold. But you would expect the lines to adjust and the opposite appears to be happening - 7.5 seems low again, though I have not looked at the SP's respective success against the opposite team.
It almost appears that there is a built-in expectation of a return to the mean - similar to the Cards' home games, where the lines did not reflect the % success the Cards were enjoying at home.