It can also be bets. You buy domains based on likely emerging markets, trends and keywords and you drop them if they stop getting traction. May be awhile before

It can also be bets. You buy domains based on likely emerging markets, trends and keywords and you drop them if they stop getting traction. May be awhile before you actually catch much traffic or value from those words but it only cost $12/yr while holding the bag. You prune the ones that fizzle out.