Can you use these points with Interval, RCI, etc?

I have a deeded 15th week timeshare that I inherited 7 years ago located in Myrtle Beach. I've used it once in 7 years. Nice place but it's on the intercoastal not the ocean and the 15th week's weather is still a little cool out! I also have to request that week a year in advance from my employer as a vacation week which are limited if I plan to visit. I joined Interval International once and tried to trade out for another location and another time but had no luck at all. Seemed to be a waste of money. No availability. I thought of renting it in the past but feared any cost I would be responsible for if damage occurred from renters. I'm tired of paying the $625 annual maintenance fee for something I am not benefiting from! What should I do?

A.Convert the week to points? Is this a good idea vs having a fixed week? What do I need to watch out for? Is there normally fees associated with this? Can you use these points with Interval, RCI, etc?

B. Sell it? Are there any real success stories out there of resales? Looks like people are almost giving them away. C. Give it up? Stop paying the maintenance fee and let Bluegreen reclaim the week. Will this work?