That's why I hope two alpha cards are always available on N-Gacha.Because the moment only N-Alpha is available for free players, the events will just become impossible for free players.
Right now, we should all have one Beta card for the next guards event (Akie), which will give us around 50% bonus (x1.5) to our SED if maxed.
Add the N-Alpha we can get, which gives a 20% (x1.2) bonus if maxed, and free players can reach only an 80% (x1.8) bonus total.
Adding an acquirable SR Alpha for free players would give them the chance for a 206% (x3.06) bonus total. An acquirable R Alpha, instead, would still give free players the chance for a 170% (x2.7) bonus total.
Just comparing that with the over 600% (x7) bonus total a paying player can reach, and considering Elite Guards that will reach the multiple millions of HP against the 200k~300k that is the staple for current high-powered players, that would mean paying players 1~3-Hit KOing Elite Guards in the 2mil~8mil HP range, while free players would need at least 2~3 hits for each 1mil HP with no free Alpha (which would mean spending 3~15 puddings per high guard), but actually be able to 1~2-Hit KO Elite Guards in the 1mil~2mil HP range (lowering the pudding consumption to 1~8 per high guard).
That's a huge difference there.
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We need to remember that after a certain event (don't know which one exactly) JP PPS changed the way Guards worked, by throwing tons of Normal Elite Guards that didn't reach too high in the multi-million HP count, while adding the SUper Elite Guards that work in the dozens to hundreds of millions of HP and need at least 10 of your contacted friends to chip in with a 2mil~4mil hit in less than 30 minutes.
This means that, SEGs coupled with lack of free SR Alpha, only paying players will ever be able to recieve the second period's special rewards; while free players wll just stay in the NEGs tier.