It's unusual to me, but I haven't been keeping track of GP sponsorship. Seems it's all Pirelli or Heineken. A while back it was Santander - and their but ugly trophies.
F1 essentially appears to have lost individual sponsors for Grands Prix some years ago.
Looking at the races, 16 officially have a title sponsor. However 11 of those are from general F1 sponsors (Rolex, Heineken, Emirates, Pirelli, Johnnie Walker), who all presumably sign on to sponsor a number of races as part of the broader deal. Another three are the state-owned airlines of countries with state-owned races, so again that's presumably linked to the race contract, and it's probably the same with Russia and the state controlled VTB bank. So Eyetime is most likely the only company to come to an individual agreement with FOM for a race sponsorship.
It is very odd. The deal was only announced a month ago, not necessary unusual but not normally the way an event on this scale does things. There's been plenty of obscure and dodgy "sponsors" in F1 before, but not usually at this level, and FOM's other partners in recent times have all been large, well known corporations - not start-ups no one has ever heard of. The links to a potential pyramid scheme makes the whole thing weirder still. There was a general assumption Liberty would run a straighter operation than Bernie too.
Well for their sake, I hope they've been paid in full...