As the proposal highlights, we used a 30 day TWAP price to arrive at the $46.60 value. The Woof team helped us with a custom ABI to upload to Tally to execute this proposal. The price of Comp at that time was about $54.05 (Thursday, November 21st at 4:27pm UTC, @dmitriywoofsoftware can confirm). The reasoning we used a 30 day TWAP was so that we could use a weighted cost for Comp and hold a majority of it throughout the duration of the year, allowing us to be more financially aligned.
Of course we were not able to predict the drastic price increase over the weekend after the vote was submitted, and in an effort to not overcharge, the GWG voluntarily repriced ourself on the higher new spot price (pricing at $64.8/comp as highlighted in the edit)