Just now I read WTH signature rules which are as follows :
Other Rules :

1) Signature with text and links, Images and Banners are not allowed.
2) Use normal font in your signatures and size not more than 2.
3) No more than 3 lines, including spaces, are permitted within signatures.
(Silver and Gold Members Allowed to use 4 lines)
4) You may choose to use bold or color in your signatures.
5) one signature can be at most 50 character long with description.
The first point says we cannot even keep any hyperlink in our signature. So I wonder can I keep cashtalk links in WTH. Do they allow it?