Most people that are on mingle are in someway lonely
I agree
Majority is of lonely people
I agree too, since what was stated was "someway" lonely.
There is no reason to seek out interaction with others (most especially strangers or shallow relationships) unless there is "someway" feelings of loneliness, or it's necessitated by another purpose (e.g. to do what you need to do for a job/hobby and interaction is necessary to accomplish that).
Since the sole purpose and function of this site is interacting with people in someway (directly, indirectly via viewing profiles/posts, or passively) then in order to come here there is some desire and a conscious willing choice to interact with people.
But if you are defining "someway lonely" or "lonely" as desperately lonely, or wallowing in loneliness, then I'd disagree.
Any seeking out of interaction with others is driven by "someway" degree of loneliness (unless driven by ulterior motives, like to ask for money, then the money can be the motive and people are perceived to be the easiest path to that money and there is no loneliness involved, although a case could be made that there is in "someway" a level of loneliness which influenced the person to perceive other people as a means to money and they are seeking out the interaction as an additional fulfillment).