What you are describing, with the small daily earnings and then buying more "rigs" within the platform, sounds exactly like a lot of those old cloud mining scams. Then it is probably already closed because the vast majority of them were scams. These sites were popular in the past, but if you cant find out more details, it is hard to figure out which one it was. The fact you cant remember the site name or much about the "rigs" themselves is a strong indicator that it was one of those short-lived, fly-by-night operations. They pop up, promise easy money, get enough people in, and then vanish with everyones deposits.
Thanks for this as it brings back memories of the time when someone tried to sell me the idea of joining one of those cloud mining sites for just $100 for the basic package. He went on to tell me how his life changed by just joining and how he has made more money enough for him to resign from his join and focus on doing something else.
But I was already too knowledgeable about this cloud mining scams to be cajoled into joining.
That site was short-lived. They don't just vanish, I think to lie low and rebrand into another name and start all over with new sets of beginners interested in mining.