when i was a paying customer i'd actually buy boosts for double xp events, i wouldn't bother with boosts for a normal play session, but on double xp events i found boosts to an incredibly attractive purchase! double xp from event + double xp from boosts + membership bonus = $ $ $ $ $ $ $ certs galore! they all stack in crazy ways, the membership "quad xp" events were absolutely insane with boosts! tl;dr double xp events are actually the BEST time to use boosts, ergo more double xp events = more good times to buy boosts!
Even more if it's those quad XP events! My friend and I activated our squad XP boosts, plus I'd make sure to stick around for all alerts and large base fights. I was swimming in over 6k certs by the end of the day and I didn't even have membership.
errrrmmm we do have halloweenmasks for up to a 15% xp boost ... and halloween rewards .... soooo ok sure that may not be double xp but it´s not nothing either ... to those that haven´t participated during such events ... .. i surely missed a couple DXP events ... pretty sure we get one by the end of november ..