Draft Definition: moments in mass-produced art characterised by a rapid turnover of ideas and an emphasis on sensation over execution. (The triumph of the gimmick and the novelty).

Thrill-power it seems to me arises in circumstances where creative individuals find themselves with a high degree of autonomy but extreme time, competitive or commercial pressure. The motive for producing thrill-powered material tends to be short-term monetary gain, or creating a sufficient quantity of work to survive financially.

Examples of thrill-power:
2000AD 1977-82 (obviously)
Marvel and DC Comics, the 60s (& 50s & 70s to an extent)
The UK home computer software market, c.81-86
Several moments in pop music eg. disco boom, dance and rave music, eurodance, 70s radio pop, etc. (also see below)

Provisional further examples:
80s pop video?
60s US garage punk?
70s UK punk?
Victorian stage magic?
Penny dreadfuls?
Early hip-hop?

The enemies of thrill-power: Time. Individual artistic aspiration. Effective market research. All of these can of course produce excellent work, but such work is unlikely to possess thrill-power.