Hi Oleg,
I've used Onlywire in the past to generate back links and pre Panda/ Penguin it was successful. Agreed it raises some brand/ product awareness but I would worry that large scale production of links back your site (s) will have some negative effect over time or even get ignored by the SE’s (making any spend on this service worthless).
Surely it’s better to get real people talking about / promoting your products / services than “fly posting” - which is essentially what bookmarking is.
Luis - using these types of software and focusing on better rankings “clouds" the most important thing - you want engagement and conversions for your products / services and not necessarily the top rankings. It’s important to tell people how good your services and products are and the only way this can really be done is by engaging with individuals. As more and more individuals engage with your products and services your rankings will naturally increase (as will sales / conversions).
Don’t try and game Google and the rankings - it only will frustrate you and ultimately lead to worse ranking and traffic.