How to achieve high bitrate during submission?

I saw footage from other contributors and their specs says 300 mbs.

I shoot w a GH5 (4K 60p) and renders to 4K mov a the highest bit rate. But when I view my accepted file on Pond5.com, it shows Bitrate of 80 mbs.

(A) How can I improve my bitrate?
(B) Do people consider their purchase base on the footage's bitrate?

(B) NO!

Higher bitrate, render in ProRes

As Jason said, no one cares about higher bitrate.
Well, maybe some higher end buyers.

ok, thanks guys!