I believe Mr. Spread abandoned SPR project because of Suprnova pool and other pools in the future, if any will exist. "No pool" was his main and original concept, but I don't think ocminer did a bad thing on purpose. It was a challenge for any pool owner. Ocminer just solve a challenge.
On the other hand, Mr. Spread shouldn't be disappointed with pool existing. SPR could raise in other directions despite of pools.
I personally haven't dumped any SPR before, and I'm still mining it, but I don't expect any bright future if Mr. Spread won't return.
I'm ready to help in testing, as I did in previous 2 tests, or any other way to promote SPR, if anyone would be interested in futher development.