Yes, this is what I tried, but then limesurvey will not replace the word SURVEYURL with the actual survey URL. Only if you use the {} = {SURVEYURL}, limesurvey will recognize it as replacement field and replace {SURVEYURL} with the according link.
the problem with
<a href="{SURVEYURL}">Please click this link to go to the survey</a>
is that {SURVEYURL} seems to generate a "<a href=" hyperlink already so, it doesn't work.
The only working solution I found is to use the actual link and just replace the token id with {token}.
Then it works but if one also replaces the SID with {SID}, it doesn't work.
Using {SURVEYURL} or a replacement for the URL to the survey would still be nice.