What happens when you hit the hard limit in Idle Oil Tycoon?

I've been playing Idle Oil Tycoon on Android for a while, and I am at the point where many of the upgrades are purchasable (they prices show up as "infinity" signs).

I suspect this is due to some data type overflow that happens somewhere in the region of 10^306-10^309.

While a bit interesting, and telling me a bit about the programming of the game (in some cases one can deduce in which order a certain calculation takes place, for example), I feel an impending doom knowing that I will soon hit a point where my cash balance hits the overflow limit. I'm hoping someone else has already hit this point and can answer the following question:

What happens when I reach the limit? Do I instantly get infinite experience and thus infinite income from even a single property (effectively ending the game), or is there some progression beyond this point?

(Note that this is done in Unlimited Mode and took a few months to do)