Title, if you want one!!!
According to some of the crew members of Stretch Armstrong and the Flex Fighters, Netflix still hasn't made a decision on whether to renew the show for a third season or not.
I'm not 100% sure myself what the best way to convince Netflix to renew the show is. But I guess we can take some pages from the Young Justice playbook.
Keep watching the first two season again and again. You don't even have to actively watch the show. Just have it playing in the background. And once you finish all 23 episodes, start it again.
Use the "Request" function to tell Netflix you want another season. Season 3, 4, 5, and so on and so forth.
Maybe even send them message through Twitter and other social media accounts.
Or course, regarding the latter two options, even if we ask them for it again and again, unless the viewership numbers indicate that there is indeed an audience / fanbase, they may not care. So make sure to binge watch again and again. And if you have friends, ask them if they can do the same. Or convince them it's a good show they should watch.
I guess this also applies to other Netflix shows and how to get them to keep coming back. Such as The Dragon Prince, She-Ra, Cannon Busters, etc.