I've only asked for a CLI once with Wachovia. I was satisfied with the new limit I received, and have not asked again.
On that call, I was told to call back again in six months for another CLI. The rep also told me that I should have called much earlier than I did for the increase they gave me ( I had already had the account for a year or so, so the six months timeframe for CLIs seems to fit).
One caveat, however...I specifically said I did not want a CLI if it involved a hard pull on my report.
The CSR assured me there would not be a hard pull. But there was a hard pull, as I found out later. Perhaps the CSR didn't know the difference between a hard and soft pull...from other posters here, I think sometimes we know more about the subtle differences than the CSRs do.
Hope this helps, but please note that my CLI request was well ahead of the takeover by Wells Fargo. Things could be different today.
Carry on...
