Why did the Nets send out so many draft picks?

In order to get Garnett and Pierce from Celtic, the Nets paid three first-round signings. According to the rule that a team cannot be without the first round for two consecutive years, the three first round signings (20 14, 20 16, 20 18) must be separated by one year.

If the first two of the three first-round drafts are protected, it is likely that the draft in one year (for example, 20 14) will be protected and postponed to the next year (20 15). In this case, the Nets' consecutive 20 15 and 20 16 draft picks will be traded. Therefore, in order to pass the transaction, billie king can only follow Anji's example and give up the protection of the draft pick, so that the Celtics can get a big bargain this year.