Ask HN: How to acquire any open source project?

I am building something similar to Twilio but only for WhatsApp. For my Product, my target audience is software developer. Now as a developer, I personally hate any kind of marketing targeted to me.

So for my Product, I am thinking of acquiring few open source project in some kind of messaging space and improve it by adding resources to it.

I am not quite sure how acquisition happens for open source software.