I will appreciate vs I will be gratefull

Some examples from the web:

• We all want the same thing here, and I will appreciate your cooperation in this investigation.
• And those who can pay today, I will appreciate it.
• And plus, I will not appreciate you coming here again tomorrow.
• Well, I think theAstraeuscrew will appreciate that.
• There is something I think you will appreciate.
• I expect and will appreciate clear answers and full disclosure of all relevant information.
• I expect my fiancee will appreciate it when the time comes.
• I'm sure Harry will appreciate you coming by, Mr Musker.
• I think my followers will appreciate this.
• I'm sure Silver will appreciate it.
• I'm sure Lois will appreciate that.
• After Seattle I am sure you will appreciate the significance of these agreements.
• There is something I think you will appreciate.
• Stan, I'd like to invite you into the club to hear a band I think you will appreciate.
• Madam President, I believe you will appreciate that it was necessary for me to say these things again here.
• I think you will appreciate the consideration the Chair has shown you.
• So I hope you will appreciate that we cannot accept the amendments on penalties or inspectors' powers.
• However, I'm sure you will appreciate that she and her friends may not be quite so...
• Mr President, honourable Members, I am sure you will appreciate it if I refrain from speaking northern Swedish - if there is such a thing.
• I am sure you will appreciate that this will require everyone to assume their responsibilities.

Some examples from the web:

• Nov 20, 2015 ... I will be gratefull if you can verify me...please i'm marellnavarro. Avatar. Stephanie Scott December 12, 2015 16:29. Musical.ly is the only app I ...
• Feb 20, 2016 ... I will be gratefull, if somebody can help me to run the following program it says there is a problem with matrix thank you here is the program
• I don't have any biological science degree, so if you can please explain it to me in a very simple way I will be gratefull. What does strand means and what is + ...
• Feb 15, 2016 ... ... yet...i have two beautifull daughters so this adds onto the stress of not being able to work...i will be gratefull for any funds towards assisting us.