One extra mana to exile a card like Arclight Phoenix or Tenacious Underdog isnt bad at all
But when you are playing against the rest of the table that are teamed against you, you don't want to have your great cards sitting in your hand unable to be cast because you are mana screwed
As addressed above, where that hobby is elevated to a business activity, there may be immediate tax consequences for the taxpayer
Vampires is a synergy deck and needs a good number of its own cards in order to function
Its ability looks pretty insignificant at first but combined with certain cards, it can help you produce infinite mana, buff your creatures with a gazillion counters and draw at the same time, or even have infinite turns
Jace broke Standard wide open in 2010 and has been pulling his weight handily across all other formats ever since