Good question.
The assets separated for eBTC’s bootstrap as per TCD 100, were stored in the form of $wETH and $BADGER as per the “value preservation of ibBTC rewards” TCD, #37. Purchasing the initial $BADGER meant a demand pressure for the asset.
For the implementation of this and other bootstrapping incentives program, $BADGER is being purchased from the pool of wETH on the ibBTC Rewards Multisig as priority. This should balance out any sell pressure from reward recipients.