https://liquidstock.com/blog/unlocking-value-why-stripe-turned-to-a-tender-offer/
一般股權十年期，未上市rsu好像七年期？不能變現過期會失效。
"Stripe reacted by raising a $6.5 million down round and conducting a tender offer, to provide employees with liquidity for their company equity and to allow the company to accelerate the vesting of Restricted Stock Units (RSUs) and cover the resulting tax obligations."
