Game company Sony Interactive Entertainment recently offered a bonus subscription for the PlayStation Plus subscribers to thank them for being a valued subscriber.
PlayStation Plus subscribers gets Funimation premium
Random PS Plus subscribers (most likely older members) get the chance to have a two month subscription of Funimation premium. Sony will email the chosen subscribers with a voucher. They must have received the promotional material from Sony PlayStation.
The voucher code has a limited time only, which needs to be redeemed before June 7. The two months free Funimation premium normally costs $5.99 per month, so it is worth it. Also disable the auto-renewal if you do not want to subscribe further.
Thanks Twisted Voxel.