Speaking of economic incentives, here's something cool.

A based agorist running a business where XMR is the primary source of income has felt compelled to rent 1 MH/s to thwart the attack. His reasoning:

>This is just a big deal for us because Monero has typically been most of our business, and is really the only sensible crypto someone will use to rent servers. Hoping that if enough people pitch in and burn some money, we can make it too expensive for Qubic to continue.
>We've been fortunate to have some really generous customers over the years to allow us to this. It would be so harmful for all of us for Monero to have any lasting negative impact from Qubic's stunt.

https://www.reddit.com/r/MoneroMining/comments/1mnqq11/renting_1mhs_to_try_and_slow_down_qubic/

Makes sense that business owners with a stake in Monero's operability would feel threatened by this attempt and pitch in. On a grander scale they could constitute a kind of army reserve that can be counted upon in times of need.