I've asked for a cli after getting good a small auto increase from the love button and it was approved. My first cli on Walmart card (SL 500) was a couple hundred bucks on the love button. I chatted and asked for more and got 4k. In general I've had better luck calling than chatting or love button. Others has posted the opposite so see what works for you. Good luck and report back!
@Anonymous wrote:
Most of us are not able to get increases through the luv button. And, even if one did, as you said, it would be only small increases. Same with auto-increases. Most of our successes came from chat or CS. They immediately grant large increases. Why wait a year or more to have it grow to just $2000, when you can get that now?
As you can see, ymmv. But, most of us have gotten immediate increases to $3500, some more. So good luck!!
Most? Synch isn't that stingy. Got my amazon store card from a CL of $200 or whatever it was to now $5,000 after 2 years.
@emily15 wrote:
Do I have to ask if it will be a SP? And if they ask for an amount do they always counter if it's too high? Or will they deny it.. seems from what I've read they will counter but I don't want to go too high
"too high" to you may not be too high for them. Think of a number you are content with and just ask them. No fear 
@emily15 wrote:
Do I have to ask if it will be a SP? And if they ask for an amount do they always counter if it's too high? Or will they deny it.. seems from what I've read they will counter but I don't want to go too high
They don't counter ... at least for me but they are never HP's so there no risk. At least the cards that I have with them aren't HP's
For me always SP and always counter (except Care Credit of course). If they don't counter you probably left money on the table. I got approved for Amazon for around $2500. Don't remember exact amount. Called in same day asked for 10k they gave me 6k.