Here is delek's brilliant playfrom wampeter on IV board:
"My understanding of the offer is that it is subject to no material adverse changes. A Stella disappointment would be a material adverse change so the offer only takes effect on a postive Stella outcome. "
So, delek puts a blockroad at $1.95 in case things turns good and they can retract the offer if things goes wrong.
I keep anyway, they will need to reach 90% to get my shares, and I bet it's gonna be at much higher price...jmo.