2/
Setting up future DDOS attacks, malign influence campaign, & scams. Laying the preparatory groundwork for later doxxing, swarming & mobbing algorithms on social media.
(Similar to Russia's Cypriot 5-minute crafts website morphed into a targeted disinformation conduit on Meta. It targeted seniors & kids)
Testing which emails are active, no different than those anonymous calls about Chinese visa expirations & free cruises.
Filling up an email account to trigger overage fees.