How Many Warnings Does It Take To Get Banned On Dp?

Can anyone explain exactly how the warnings work on DP now please?
I received a warning today for (I thought) innocently thanking a poster for giving some information and commenting that the blog they had posted about looked quite nice too and I'm now concerned that as I'm on two warnings (probably not too bad in 4 years + of using DP) I risk being banned at some point.
I've searched the FAQs but can't find anything that mentions how many warnings are likely to lead to being banned or if…
How Many Warnings Does It Take To Get Banned On Dp?

See original post by PrometheusUK