Agreed, all seems extremely minimal.
Better off with a miles subscription if you'd want miles & buying SAF if you'd want to boost status or donating miles.
Was kinda excited for the prospect but this is just not it.

Would have been happier to see Abonnements extended to KL, SAF bundles (e.g. x % per flights incl. XP), etc.
As for cash discounts; Something like Iberia/Santander might even be more worthwile.

All in all, fairly confusing product.

Also notablel; on quite a few routes, especially intra-europe, FB miles prices are simply not competitve.
E.g. Iberia is frequently for 8k or now even 4.550k economy or less than 12k EuroBusiness.
Same with other flights and destinations.
If anything, things like this only incentivize me more towards non-branded Amex/Rev. Especially when looking at this combined with the French Amex changes.

EditL just did the calculus. If the main motivator would be the XP, then 700.- SAF = approx 70 xp.
For 70 xp as the 20% bonus, you'd need to fly 350 xp regardless.