If A deposits 100 UST into Anchor, getting back 100 aUST. Then deposits this 100 aUST into Mirror. To be fully covered, he needs to buy a cover for UST de-peg risk with a cover amount of 100USD, a cover for Anchor with a cover amount of 100 USD and another cover for Mirror with a cover amount of 100 USD. Now with our Anchor + Mirror + UST De-Pegbundled cover, he only needs to buy one cover with a cover amount of 100 USD, and get insured for both protocols and possible losses due to UST de-peg events.