Is there any zerg players which builds drones until they get 10/10, and then builds 2 extractors, build 2 more workers then cancels the both extractors and suddenly you have over your overlord limit with 2 more workers than allowed and only a loss of about 25 crystals by cancelling the extractors. I'm the only one abusing this feature or are there others. However it's pretty useless to build spawning pool first, as it's normal to get overlord to get enough pop to build zerglings and thus not so applicable anymore at the point you get overlord.
Advantages:
You get faster income before spawning your first overlord/spawning pool.
You can expand base more quickly while doing zerg rush cuz of 2 additional workers mining before getting more pop while you massing zerglings
Disatvantages:
Takes a bit longer time to go 6 pool if you go this tactic first
Minor loss of faking building extractors
Weaker against rushes
Advantages:
You get faster income before spawning your first overlord/spawning pool.
You can expand base more quickly while doing zerg rush cuz of 2 additional workers mining before getting more pop while you massing zerglings
Disatvantages:
Takes a bit longer time to go 6 pool if you go this tactic first
Minor loss of faking building extractors
Weaker against rushes