Hey Mate, There are very few websites/services that are worth what they charge (which is unfortunate for the KS and crowdfunding community in general). 'The Gadget Flow' does seem intriguing as they have a REAL fan-base and lots of high quality traffic, and for this reason, I am going to be giving there standard plan ($280) a go. I'll be sure to post a review in a new thread about how it goes in a few weeks
I haven't used Krowdster and do not plan on using them due to negative feedback from a good friend of mine. What I did sign up to a few weeks ago however is a website called backerdatabase.com
Now BackerDatabase has a free trial so you can check out the administration panel and see exactly the services that they have on offer, and if you do wish to continue your purchase to actually use those features it is $19.99 (which is quite a reasonable price). They have an exportable media database of 2.5k+ contacts as well as a PR blaster (that automatically sends your press release to another few thousand contacts). I am yet to try out either of these services, but again, will provide a full review when I get the chance to experiment with everything they have to offer.
My favourite service they provide are 'backer leads'. They have Facebook profiles, Twitter profiles, Google + profiles as well as Tumblr, Reddit, and website leads. You can filter these by which category of project they created/backed and have the ability to go through them all and personally connect with everyone yourself to get the word out. This is something I have used quite a bit and the lists seem to be updated from what I could see.
SUMMARY: Krowdster; not so sure (but haven't used them so can't personally comment in that respect). Gadget Flow; looks good, will be trying there standard plan in a couple of weeks time. BackerDatabase; a cheap way to find backer leads and media contacts (worth the $19.99).
If anyone has any questions, please let me know
I will be sure to review all services I use in independent threads once I have the time to delve deeper into everything. All the best!
Regards,
Jakob.