It doesn't make sense to sum those growth multipliers.
Obviously, and that is indeed the reason why I'm not summing them. I said "in absolute numbers" multiple times now.
These "absolute numbers" you're talking about are the expected profits, not the expected growth factors. They are different things.
Expected profits are "absolute numbers" - you can add them. Expected growths are multipliers - you can multiply them.
So you have nothing but semantics and quibbling over the meaning of the word "growth"? Do you perhaps have something substantial to say about the argument I made?
Let's define this properly. Let B_0 be the initial bankroll and B_N the bankroll after a sequence of N bets. Then BG is a random variable which, when given said sequence of N bets, takes the value B_0 * log(B_N / B_0) / N. Likewise for PG.