It probably feels pretty cool to have something you do which you figure will just be a niche thing that only a few people will ever know about get really big years after the fact. (I'm not saying nobody knew about What I Am, but I am saying that me and my little world of people didn't know about it when it came out.)
Maybe this goes in the weird history thread, but speaking of an effort getting bigger later, I remember this cool story from the mid-90's. Original Beatles drummer Pete Best had left the band before they ever hit it big, and plenty of more casual fans wouldn't even know his name, certainly not like Ringo's. Sometime in the mid-90's they put out the Anthology compilation set, and it included two songs, I think, from before they were big, which Pete had played on. After living a life of relative obscurity and financial normality, the royalties he got off of those two songs made him a millionaire (or maybe multimillionaire) almost overnight. I always thought that must be crazy. You sit around for 30 years, possibly wondering what might have been if you'd stuck it out, you watch your old bandmates go on to all this crazy musical and cultural success, and BAM, one day in your late 50's something like that happens and you've got a sudden windfall.