Nerijus Gudelevicius would entice Lithuanians to the UK with the promise of paid work, delivering and collecting charity clothes bags.
The 34-year-old, of Westlea, Swindon, was found guilty at Swindon Crown Court of two charges of human trafficking.
He was cleared of a further four charges of slavery and released on conditional bail.
The court heard Gudelevicius would pay workers between Â£10 and Â£30 a week - but sometimes payments were made every fortnight or three weeks.
He would also charge them Â£40-a-week in rent, if they needed accommodation.
Gudelevicius, originally from Lithuania, is due to sentenced at Salisbury Crown Court on 19 June.
Following the judgement, acting Det Insp Rob Findlay said the verdict was a "positive result" following months of robust investigation work.
"The victims of human trafficking are often very vulnerable people who are used as simple commodities - often for the financial gain of the perpetrators," he said.
"Wiltshire Police will always treat human trafficking as a priority and vigorously investigate, along with our partners, such incidents.
"Community-based intelligence proves crucial in investigations such as this, and I would always urge anyone with information or concerns about potential victims of modern slavery to contact us."

Carla Lockhart made the comments at a meeting of the Public Accounts Committee, of which she is a member.
Ms Lockhart also confirmed a DUP statement which said she had a relative in the non-domestic scheme.
In December, Sinn Féin said PAC committee member Michelle Gildernew MLA had a brother in the domestic scheme.
Mrs Gildernew was absent from the committee on Wednesday.
The PAC has been running an investigation into the handling of the non-domestic RHI for several months.
The green energy scheme was intended to increase the creation of heat from renewable sources.
However, businesses were receiving more in subsidies than they were paying for renewable fuel and the scheme became majorly oversubscribed.
The fallout from the scandal surrounding the scheme, which is approximately £490m over budget, resulted in the collapse of Stormont's institutions and the calling of snap elections on 2 March.
Mrs Lockhart told the committee on Wednesday her brother-in-law had been a recipient of the heat subsidy since 2014, but she had been unaware of that fact until January 2017.
She was responding to a request from UUP MLA and committee chair Robin Swann for any committee member with an interest in the scheme to declare it.
Mrs Lockhart said as well as being unaware of her relative's involvement with RHI, she did not "help or assist with the application process".
"My mother and father have poultry farms and do not have RHI and I can let any journalist see my bank statements and they will see there's no benefit from RHI," she said.
Mrs Lockhart said it would be useful to know whether any committee member absent from today's meeting had any interest in the RHI scheme.
The chairman said he would ask the committee clerk to write to all its members seeking the information which would be circulated to all the other members.
DUP MLA Trevor Clarke asked whether this would cover any relative including one "three times removed".
Mr Swann went on to thank members for their work on the inquiry.
He said they'd managed to remain "apolitical" and had done "sterling work".
He said the work was now in the hands of the upcoming public inquiry.
The committee does not intend to publish a report on the work done to date.
A man has been found guilty of human trafficking in what police have called a case of "modern slavery".
[NEXT_CONCEPT]
A DUP MLA has offered to let reporters see her bank statements to prove she is not benefiting financially from the Renewable Heat Incentive (RHI) Scheme.