This does not actually work. CursorBlink setting is exposed only for terminal app. So setting CursorBlink at global level is pointless.
The other solution is also a really bad idea. 100000000 milliseconds is roughly 27.78 hours. So, your cursor blink period is set to slightly longer than one day. If you leave your computer on for a long time that means that there will be a period when your cursor will disappear (the OFF period of the cursor blink) for 27.78 hours.
Did you actually try this to see if it works?
does this work with mavericks? afraid to mess up my os. many thanks.