Idea number 555:
1 Create a service which would set up several thousand GMail accounts.
2 Charge company X money to send e-mail (between those accounts) containing keywords triggering Company Y's (Company X's competitor) ads.
3 Exhaust Company Y's ads on bots reading those GMail accounts.
4 Profit!!!

Idea Number 556:
1 Create a service which would set up several thousand GMail accounts.
2 Charge company X ransom money to NOT send e-mail (between those accounts) containing keywords triggering Company X's ads.
3 Exhaust Company X's ads on bots reading those GMail accounts if they don't pay the ransom.
4 Repeat 1, 2, 3 to increase profit!!!