Possible bug, EXP is gained based on time spent in the air in seconds, rather than rounds of combat, which means that any investment in Quicker Ticker upgrade massively reduces your EXP gains.
I noticed this after a Rebirth and then had a 30 minute jump that netted me 60 million EXP, but then subsequent jumps (with Ticker) over the next 30 minutes got me only about 4 million EXP.
Honestly, its a nice game when you FINALLY reach Super Game, cause there no more of that CAMERA. Ugh. But getting there is such an utter PAIN for the later tiers, I.E. anything past the MP5. Such as the whole daily log in thing resetting after the last day, you not getting any experience from the quizz if you, say, get 3 right and then miss one. Etc. Honestly, this is one of the few games that has made me want to legitimately harm something, probly an egg or pillow, but still.