Generally, no.
In the past we have supported crowdfunding campaigns that are of strategic importance, but this has opened the floodgates for many campaigns demanding that we also feature theirs.
Crowdfunding campaigns are generally pre-order campaigns for products. Therefore, asking ArtStation to feature a crowdfunding campaign is akin to asking us for free advertising.
If you wish to buy advertising, we're happy to accommodate and feature your campaign - please see ArtStation Advertising for our advertising contact.