To receive more rewards I guess is to join more campaigns. Like the translation, blog and signature. While you learn the project, you might just learn it all by writing things about it.
And you really follow this strategy? You know everything about the project? So why then you participate only in a bounty campaign and you don´t apply for an Ambassador position for example?

I personally have been onboarded on a couple of teams that I originally just participated in their bounty campaigns for. This is how I became a Sheriff for Bounty0x, then quickly rose all the way up to Distribution Manager. I've also became a Community Manager for a couple of projects such as ArtPro after participating in their bounty campaign.
If you follow these tips I posted below, the teams you invest your time in to create quality work will take notice to you pretty quickly. They are always looking for dedicated community members to help increase their marketing or community engagement, and if you are looking for even more tokens, I advise you get busy as there are so many awesome opportunities out there.
Teams normally check which bounty participants knew the products they are selling to investors. And if they see one they will communicate to it even try to make you an ambassador. All the more they are going to be interested to you when you have a high rank and the tokens you got from bounty campaigns are more than what real investors got. I see this kind team to more likely scam and will hire you to respond to their victims.