Are you attempting to show a fellow Imperial citizen that you "care," but lack the proper emotional STC to express it? Fear not. The Tech-Priests of Exterminatus Co. have unearthed the perfect solution from the deep, forgotten wastes of Holy Terra.
Behold the M2 Archaeotech "Gyft-Kard".
Scholars believe that in the ancient 2nd Millennium, before the dark age of technology, citizens would exchange these powerful data-slates to bestow unbridled purchasing power upon their allies. It is crystallized, amalgamated thought—a mystical medium used by our ancestors when words failed them.
By bestowing this holy relic upon a battle-brother, sister of battle, or newly conscripted hobbyist, you grant them the absolute authority to choose their own Chapter, summon their own reinforcements, and expand their armies.