I don't want to spam my sig, but I'd suggest you to take a closer look at it
I´d say 1:10k is really good when you can hold it for a longer period of time, 1:15k happens sometimes with a fresh site, 1:25k-30k is ok and anything more should be a reason to switch sponsors. But sponsor hosted galleries could convert a bit worse, since they´re mostly overpromoted.