Avoid using the card for blocking anything [at Hotel for room booking, or initial block at car rentals]. (money.stackexchange.com)
Much work has already been done in this area, from substantial improvements in CPU bottlenecks, memory usage, network efficiency, and initial block download times, to algorithmic scaling in general. (bitcoinmagazine.com)
This is done by writing what DocAssemble calls the «Objects Initial Block.» (lawyerist.com)