Per-service addons and upgrade options on client portal
Rather than show a big, ugly list of addons avaliable in one big useless place (my services > available addons menu) show them as prominent links within each active service panel themselves, with name, description, price and "BUY NOW" or "ADD NOW" button.
This will make addons and upgrades much clearer and easier to upsell to customers. MORE REVENUE!
So for a hosting package you might show SSL upgrades, Sitelock and any manual addons available to purchase as a list, ideally directly within the main window too so as not to need to click into "Service Addons" link. Currently the Addons tab displays nothing but a link to the list of all-services qualifying addons and without any marketplace addons.