I just stayed with Crashplan on one PC (my server).
As before, each PC in my house still does image backups nightly to the server (using Veeam). I wrote some quick scripts to dump certain folders on each PC to the appropriate family member's user folder on the server (which Crashplan then backs up to its cloud). Plus, my previous Crashplan subscription goes until April and then I get the next year at 75% off ($2.50/month). After that, the one server will cost me $10/month ($120/year) which is $30 less than I was paying for the old family plan. Not quite as convenient, sure, but it'll do just fine. And, yes, that $10/month is for unlimited storage space.