It also encourages you to, you know, attack your opponents and play the game, which many of the EDH pods Ive played in could use
Magikarp - 203/193 Paldea Evolved Illustration Rare Market Value Loading
In that case, you can only subtract 2 tix from the selling bot, and later, if you want to use just a fraction of those two tix, let's say 1.5 in another chain like Goatbots, the bot will keep 0.5 as credit that you cant subtract unless you use it to get new cards
Historically this was things like Skirk Prospector and Sledder to empower untap triggers and Goblin Warchief to get them online quicker and safer
Now we're in the TCG Live era, a black border is good, and a white is normal
Its as if the designers tried to say: Hey, if youre bad at deck-building, heres at least some extra health for you. A good deck utilizes mana very accurately, and you almost never should end up with excess mana, unless something totally unexpected happens