Anything can sell. I had a sale of pills on white background for 200$ gross. And also another sale 195$ gross, different subject, both files also on MS. I suggest you shoot local food, for example traditional food for your country, and tourist places etc....

Also, as others said, it takes a while before you get any sales, I went a year without a singe sale, now I have them, not many, but they're there. Had 5 sales in november and 1 this month and expecting one more to be reported in January because I found one of my images used on www.telegraph.co.uk

Most of my sales are RF and I have them also on MS sites....but it's also true I don't have many RM images at alamy, probably less than 30.

I think to make a real go of Alamy you have to shoot images that suit their market whether its worth it or not is a personal judgement and depends on how much time you have. Next year I'm planning to shoot more and spend less time on low earning sites (for me). Best to concentrate where your style/abilities where get best returns I think.

For "Travel" I think alamy needs documentary/story telling pics rather than pretty postcard travel agent type stuff. Doesn't always need to be anywhere exotic

I am good at shooting travel photos but I am not going anywhere on holidays in the near future. When weather is bad I do food photography . However, the few travel photos I shot are selling well on microstock but no sale on Alamy.

You don't need to be a tourist yourself to shoot travel photos. Think of your own place as a travel destination for others.