Because all most of the fetch lands that Glimpse plays can find Savai Triome, making it not that challenging to make Leyline Binding cost one mana
This is partially alleviated by multiple tournament formats, in which the most popular format only uses the most recent core set and two recent expansion blocks, thus ensuring that all cards in the format are in print
Dockside Extortionist is played almost exclusively in Commander, while Jeweled Lotus is all but unplayable outside Commander because of the restriction on how you can spend the mana it makes, (notwithstanding a niche Vintage combo that involves Doubling Cube)
Not many cards on this list can be used to generate card advantage, you have to combine Top with a card like Voltaic Key for it to do so or ignore oracle text for Lat-Nam's to situationally do so
The other type of counter refers to countering a spell or ability so that it doesnt happen
It makes sense when you consider that it has lifelink and extort, so its made to play with other lifelinkers