An add-on with truly useful utility, but ... Ohodnoceno 4 z 5 hvězdiček

Truly an add-on with utility. But, Raplets that I have used are not well integrated. I added the Crunchbase Raplet and it does not appear in the Rapportive sidebar. I know this is not a support forum. But, Rapportive does not supply one, and according to another poster, emails to the developer are not returned. So, any thoughts, or similar experiences appreciated.