How do people get filled with odd spread?

Don't options go by 0.05 tick minimum? How do people get filled with odd spread like 3.47, etc? Is there a broker that lets you trade in 0.01 tick?
 
Quote from a529612:

Don't options go by 0.05 tick minimum? How do people get filled with odd spread like 3.47, etc? Is there a broker that lets you trade in 0.01 tick?

IB does. And the rest will follow next year.
 
Quote from daniel5198:

IB does. And the rest will follow next year.

Any idea when next year? Is that by law or they have no choice but to follow the competition?
 
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