It was allowed 2 years ago when we told it before the race. Now it's 2 years later and things have changed! We haven't said anything before this race and in the rules it says "don't cross pit exit line without any exceptions".
I discussed this with other organizers, they agreed we must give penalties.
There is a small advantage. Well, first of all driving between the lines is more complicated and there is a bend which you need to do right. But if you would be allowed to cross pit exit inner line, you could go straight without making any turn and it's far more easier to drive on track and it also gains a bit of time.
Also, if it makes you feel better, any kind of pit exit line crossing is forbidden usually in real life.
And most of the other drivers drove it correctly and had no problem with it, only you and some other guys thought it's allowed to cross it for some reason.