Question about signature live links


Hi Guys,
I'm still a bit new here on Rumble and I noticed that some creators on this platform are putting live links to "physical products" that they sell, in their signature lines. I put my Rumble channel page link in mine but my question is, are we allowed to do that? I have been a professional nature, scenic and wildlife photographer for over 20 years and one of the products I offer are yearly photo calendars. (to people in the US only.) I didn't want to just put the live link in the signature line without asking first. I believe in obeying the rules here and I didn't want to be accused of spamming. Please let me know, if you know. Thanks.