1. Refer friends to Tripoto. 2. Write travel stories, put pictures in it too. This can earn you up to 100 credits.
3. Photo blogs - If you are not a writer, just post a bunch of quality pics of you trip. Photo blogs dont earn you as many credits as travel story.
4. Be active on the forum. Follow others and make them follow you.
You can earn credits by writing blogs, bhotoblogs also you need to help fellow travelers by answering their questions asked in this forum/community or you can also take their help whenever needed.
One more way of earning credits is refer your friend after their verification is done,you get some credits and when they write blog you get 20 credits.
I hope this helps you🙂