Recently I've been working on pip projects and realized that without binding the "three-piece set," it's basically impossible to get invite points… Here’s the problem: the channels I used to rely on are no longer available, so where can I find cost-effective three-piece sets now?

If I buy them, I'm worried the accounts won't last long, and the cost is almost as much as buying a down jacket. If I don't buy them, there's no way to get invite points.

Currently, my approach is: get the three-piece set first, then quickly bind it to multiple projects to share the cost, at least to get more rewards and break even. Does anyone have any reliable sources to recommend? Or maybe a better strategy?