I have looked at the scheme in some detail as an adviser. If you want to purchase a house in such a scheme you could look at offering the developer a reduced price of circa the amount of deposit you will build up over say 3 years.
Example:
Purchase Price €250,000
Rent €900.00 p.m.
Allowance towards deposit €900.00 p.m.
Term 3 years
Deposit Built up = 36 * €900.00 = €32,400
Balance Due = €217,000 in 3 years
Offer NOW = €200,000 (if you can get a mortgage!)
You can do this only if you have at lease 8% of the purchase price plus fees for solicitors, surveyors etc accumulated. If you have, then look at offering a reduced purchase price now and take it from there. If not, join the scheme on your terms.
Yes it is a means for developers to get out of a difficult situation, it is also a means for first time buyers to snap up a bargain (make sure the price is reduced in line with the local market firstly) and get on the property ladder at a better time and not waste money on rent. Have your solicitor read the contract first.