They provide the convenience of shopping from home, and many sites allow you to filter search results by set, rarity, or condition, making it easy to find exactly what you're looking for
Lastly, they've added some new rules to the game for this app specifically, but kept the traditional game design mentioning a " streamlined rules based on the classic Pokmon TCG battle system "
Here are some telling examples for Base Set holographic cards: This 20-to-1 ratio is consistent across most holographic cards from Base Set, Jungle, Fossil, and Neo sets
Be warned that if you pursue this strategy (or it just happens passively, which is inevitable to some degree) it will not carry over well to real person drafts in the other queues
However, one that says Search your deck for a Pokmon can find Archen