Still, that's only four decks, out of thousands of commanders
Two mana to give a creature Flying and +1/+1 for the turn is hardly exciting, especially at sorcery speed
On the other hand, additional abilities a creature gains aren't considered to be printed on the card, so backup won't grant them
Most abilities are probably worth less value than a +1/+1 counter, but circumstances matter: Flying is most valuable when few creatures have it, Deathtouch is best on creatures with high toughness, and Reach isnt that big a bonus
The types of mana are white, blue, black, red, green, and colorless
For reference, collector booster displays contain 12 collector booster packs, so each pack is valued at well over $30 a piece