Zaps are a good indicator for the near future but over time they may be gamed, at least to a degree, by those who are determined to game them. Perhaps at some risk, but if there is enough incentive then technical obstacles can be overcome.

Once we have lists we are in charge over crafting our own algorithms. Nothing needs to be sorted by likes or zaps and such algorithms will typically re-inforce the initial publicity.

Algorithms will favor interests of advertisers over time since there will always be sly roundabout ways of introducing changes that can be monetized.

Personal lists based on preferences is the opt-out of algorithms. Quality content will generally be found and shared into lists.