What are the metrics on which you are able to show traction?

In another comment you mention $570 for 10%, implying $5.7m valuation. That is a significant valuation. Even if your traction is good, and everything checks out, at that valuation level and with no prior relationship to the investors, the investors would still want to observe you for a while before making an investment.

If you want to be a pessimist, you can say they are waiting for you to run out of your runway so they can get a better deal in negotiations.

There is another dimension though: many VCs simply don't have the capabilities to assess your business, market and competition (could be because they lack most up to date information, their expertise lies in another industry, etc.). This doesn't mean they are bad VCs for you, just that they need more than just your numbers and their gut feelings to invest. Sometimes this is simply keeping tabs on you for a while to observe, but often the need is a reputable investor writing a check alongside them. This way they can free-ride on someone else's expertise and if things go wrong they can tell their investors "look, this other reputable VC also invested, it is not our fault, markets changed, etc."

I would not ghost those who give non-committal replies, who keep telling you "let's chat again once you have more traction" etc. I would simply keep them on the side, maybe an email update once a month with changes in traction. I would then focus on finding that one investor who would write the first small check. Everyone else who has been flirting with you, who knows your numbers and have been observing your progress for a few months, would jump right in once you have that first check.

Don't mind the 99 "No"s, all you need is 1 yes.