OK. If the company likes the contract and is happy with it, the probablility may go up, but if they don't, it will go down. Since you stated it will 80% each time, then it wouldn't be lowering each time they renew. So, they may renew it an infinite amount of times, since the percent of them renewing is constantly 80%. You didn't say that next time they renew, they're chance of renewing may be 80% of their last chance, you just said that it would be 80%. That gives the impression that it will always be 80%.
What do you guys think?