Accounts suspected of boosting are stripped of their seasonal rewards.
Due to the extreme skill gap at the top of the ladder, "carrying" a sub-par player to Rank 1 is nearly impossible. Consequently, most Rank 1 sales involve "piloting," which is a direct violation of Blizzard’s End User License Agreement. The Ethics and Impact on the Ladder
Furthermore, it devalues the title itself. When the community suspects that a player with a Rank 1 title "bought" it, the social prestige—the very thing the buyer paid for—evaporates, replaced by derision or a "blacklisting" from the elite community. The Risks: Ban Waves and Scams