I think the preposition for is cut out in allows for more niche businesses.. What about it?
3-D printing also allows for more niche businesses to enter the business world because of low overhead when entering the marketplace.

I think the preposition for is cut out in allows for more niche businesses..

What about it?

Question

I think the preposition for is cut out in allows for more niche businesses..  What about it?
3-D printing also allows for more niche businesses to enter the business world because of low overhead when entering the marketplace.

I think the preposition for is cut out in allows for more niche businesses..

What about it?

Answer

I think you could write that sentence with or without the "for"...