@xianc78 idk about "successful" but i started using rpg maker on the family computer when i was 10 years old :)
@beardalaxy I don't know how much RPG Maker costed back then, but I knew for a fact that my parents wouldn't buy me GameMaker Pro which costed $50 and required you to repay for every update. I messed around with GameMaker Lite, but it was severely limited and lacked certain features like scaling and rotating sprites.
There was also Video Game Tycoon which allowed you to create 3D action games and even burn them onto CD. It was in a monthly Scholastic book catalog that was given out to us in our elementary school. I really wanted it, but our teachers urged us not to buy anything on there outside of books (they couldn't prohibit us/our parents from doing so, but it was heavily discouraged), and my parents agreed with them (being public school teachers and education advocates themselves).
I think I was aware of RPG Maker back then, but I probably wrote it off because I felt like a genre specific game maker was worthless and I didn't care for turn-based games back then.
@beardalaxy I tried to find a way to get a cracked version of Game Maker Pro working, but I didn't know how to pirate software (outside of ROMs) back then.
There was another program that I forgot to mention earlier. It was DS Game Maker. It was also shareware and let you make DS games, but the Lite version was even more limited than GameMaker Lite. It only allowed you to have three rooms and no save feature.
But it looks like the project is still around and is now FOSS.
https://digitaldesigndude.github.io/DSGM-Resource-Site/index.html