not sure why it would matter....a B50 will only stretch so much...it is not unlimited in this ability. Once it is broke in and stopped stretching it is good.
LIke mentioned...if it has been proven leaving them strung causes no damage in of itself....and you shoot every day or a few times a week...why risk anything with unstringing the bow each and every time you want to grab it for a quick shot in back yard?
In the end...do what you like. I dont dust my arrows, dust my bow, dust my quivers...I use them...they are tools not items to display for the envy of others. I could care less what anyone else thinks of them...and dusting your equipment seems extreme when you just put them back in the corner.
Shouldnt they have a special place of honor?
anyhow...leaving a glass backed bow that is being shot will do nothing to it of itself from being left braced. I have seen many damaged through stringing and unstringing....so just saying.
If not being shot...or selfbows...they are unstrung. Right now I have my Habu strung...has been since May when I put away my Robertson from turkey season and decided the Habu would be my deer bow this year. Last year it was my Jeffery that stayed strung from February through December. Still pulls 60# @28 and had her since 1992.