I really can't see what this tag does and if there is a risk that it prevents standard search engine crawlers (Google, Bing, ...) from indexing the pages.
To be clear: if there was a name attribute with value "robots", this would have been the usual way to tell search engines not to index and not to follow links on the page, but here it is different: no name attribute but a property attribute with the partner's name followed by ":index"