You'll see tomorrow. There was a vid from CN version and they had myoboku gifts, shira frags, refines, gold etc. Not really worth buying in shop for 40cp/1 as average gain seemed to be more like 20cp

You could propably get somewhere between <450 tickets + bonus from top ranking (max of 50) throughout the season. Looking at the table above frags have 5% drop rate and more or less thats my result as well. I already 4* shira without using tickets (not recruited han, no top1 ST/zenith medal either). Unless you aim for top1 ranking spot and want a chance to 5* certain ninja (and we have no idea who will be there, but lets be real dont expect godtier ninjas) in which case those ~25frags might make a difference, otherwise its honestly pointless to save those tickets. If you play, youll get enough frags to 4* seasonal ninja, without considering ranking reward anyway.