you can only check or register the same domain 10 times every 100 seconds

[dnol]

Due to complaints from Verisign, we have now added some restrictions to the API:

"For COM/NET domains, you can only check or register the same domain 10 times every 100 seconds. "

http://www.dynadot.com/resource/forums/f6-engineering-corner/api-change-2480.html

do all registrars has such limitation?